TECHNOLOGICAL FIELD

The present disclosure relates to a multipurpose physical exercise device and a physical exercise kit including the multipurpose physical exercise device, in particular to the multipurpose physical exercise device for use in performing musculoskeletal stretches and plurality of other exercises.

BACKGROUND ART

References considered to be relevant as background to the presently disclosed subject matter are listed below:

German Patent Application No. 2,528,217 filed June 25, 1975, to Hromadka;

United States Patent 10,507,359 filed October 11, 2017 to Ken; and

Swiss Patent Application 497187 filed October 27, 1967 to Peter.

Acknowledgement of the above references herein is not to be inferred as meaning that these are in any way relevant to the patentability of the presently disclosed subject matter.

BACKGROUND

Conventional sports equipment includes a slightly domed base that can be used as a balance board.

Accordingly, an object of the present invention is to provide a multipurpose physical exercise device used for performing musculoskeletal stretches and multiple exercises, the base having a truncated spherical outer surface.

GENERAL DESCRIPTION

The presently disclosed subject matter relates to a multipurpose physical exercise device and a physical exercise kit for assisting a user in performing a plurality of exercises and stretches.

According to a first aspect of the presently disclosed subject matter there is provided a multipurpose physical exercise device comprising: an inflatable base which at least when inflated comprises a curved bottom portion having a first interior volume, a second interior volume isolated from the first interior volume, and an exterior curved bottom surface configured for rolling on an external surface, said second interior volume constituting a weight accommodating portion and being accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for removing therefrom a weight filler; and an upper platform being more rigid than the curved bottom portion and fixed to the inflatable base, said upper platform being configured to at least indirectly support a body part of a user while the user performs an exercise with said multipurpose physical exercise device, at least a majority of said second interior volume being positioned closer to an apex of the curved bottom surface than to the upper platform.

In some examples, the curved bottom portion can comprise an uppermost edge being positioned opposite to the apex of the curved bottom surface, and the inflatable base can further comprise a neck portion having a neck lower edge connected at the uppermost edge of the curved bottom portion and an opposite neck upper edge, the neck lower edge having a neck lower diameter and the neck upper edge having a neck upper diameter smaller than the neck lower diameter. In some examples, the upper platform can have a platform diameter being smaller than the neck lower diameter.

According to a second aspect of the presently disclosed subject matter there is provided a multipurpose physical exercise device comprising: a base at least selectively comprising a curved bottom portion having an exterior curved bottom surface configured for rolling on an external surface, said curved bottom portion comprising an uppermost edge being positioned opposite to an apex of the curved bottom surface, said base further comprising a neck portion having a neck lower edge connected at the uppermost edge of the curved bottom portion and an opposite neck upper edge, said neck lower edge having a neck lower diameter and said neck upper edge having a neck upper diameter smaller than the neck lower diameter; and an upper platform being more rigid than the curved bottom portion and fixed to the base, said upper platform having a platform diameter smaller than the neck lower diameter, said upper platform being configured to at least indirectly support a body part of a user while the user performs an exercise with said multipurpose physical exercise device.

In some examples, the curved bottom portion can have a first interior volume and a second interior volume isolated from the first interior volume, the second interior volume constituting a weight accommodating portion and being accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for optionally removing therefrom a weight filler, at least a majority of said second interior volume being positioned closer to an apex of the curved bottom surface than to the upper platform.

The multipurpose physical exercise device according to any or both of the first and second aspects can comprise one or more of the following features:

- the second interior volume can be an enclosed volume fixed with respect to the curved bottom portion.

- the device can further comprise a weight-filling port in communication with the second interior volume and the exterior of the curved bottom portion, said second interior volume being accessible through said weight filling port.

- the second interior volume can be configured for repeatedly introducing thereinto and optionally removing therefrom the weight filler.

- the second interior volume can be configured for introducing thereinto and optionally removing therefrom a different weight filler during one or more of said repetitions.

- the second interior volume can be configured for introducing thereinto the weight filler renders the base to be at least partially inflatable.

- the first interior volume can be accessible from the exterior of the curved bottom portion for introducing thereinto an inflating filler.

- the device can further comprise an inflating port in communication with the first interior volume and the exterior of the curved bottom portion, said first interior volume being accessible through said inflating port.

- the first interior volume can be configured for introducing thereinto the inflating filler renders the base to be at least partially inflatable.

- the first interior volume can be configured for repeatedly introducing thereinto and optionally removing therefrom the inflating filler.

- the first interior volume can be configured for introducing thereinto and optionally removing therefrom a different inflating filler during one or more of said repetitions.

- the device can further comprise a partition wall isolating the first interior volume and the second interior volume.

- the device can comprise a central axis passing through a center of curvature of the curved bottom surface and the apex of the curved bottom surface. - the curved bottom surface can be configured to roll on the external surface between an upright position of the device in which the central axis is perpendicular to the external surface and a tilted position of the device in which the central axis is at a tilt angle with the external surface.

- the tilt angle can be less than 90°.

- the tilt angle can be more than 90°.

- the curved bottom surface can maintain a point of contact with the external surface during said rolling.

- the device can be configured to be self-biased towards the upright orientation.

- the weight accommodating portion, at least upon receiving therewithin the weight filler, can be configured to bias the device towards the upright orientation.

- the weight accommodating portion, at least upon receiving therewithin the weight filler having a weight equal to or greater than that of a combined weight of the upper platform and a weight within the first volume, can be configured to bias the device towards the upright orientation.

- when the weight filler is filled into the weight accommodating portion, a center of mass of the device lies on the central axis and closer to the apex than to the upper platform.

- the neck lower diameter can be equal to a diameter of the uppermost edge of the curved bottom portion.

- the curved bottom portion and the neck portion can constitute a unitary body.

- the base can comprise a rim configured for fixing thereto the upper platform.

- the rim can be fixed at the neck portion.

- the rim can be more rigid than the neck portion.

- the rim can be more rigid than the curved bottom portion.

- the rim can circumferentially support the upper platform.

- the upper platform can at least partially protrude outwardly from the curved bottom portion.

- the upper platform can be configured for detachably mounting thereto at least one support component configured to support the body part of the user.

- the upper platform can comprise at least partially a mounting arrangement for allowing said mounting of the at least one support component thereto.

- the mounting arrangement can comprise a quick-fit arrangement. - the device can further comprise one or more attachment elements for detachably attaching thereto an exercise assisting equipment including one or more of a strap, band, rope, and belt.

- the attachment elements can include hooks.

- the attachment elements can be positioned at the base.

- the attachment elements can be positioned at the upper platform.

- the curved bottom portion can be spherical and constitute at least a half of a sphere.

- a distance between an upper surface of the upper platform and an apex of the curved bottom surface can be 40 cm to 45 cm.

According to a third aspect of the presently disclosed subject matter there is provided physical exercise kit comprising: a multipurpose physical exercise device comprising: a base at least selectively comprising a curved bottom portion having an exterior curved bottom surface configured for rolling on an external surface; and an upper platform being more rigid than the curved bottom portion and fixed to the base, said upper platform being configured for detachably attaching thereto a support component; and one or more support components, each configured to be detachably attached to the upper platform and to support a body part of a user while the user performs an exercise with the multipurpose physical exercise device.

In some examples, the support component can comprise a top surface having one or more dedicated locations for supporting at least a portion of at least one leg of the user.

In some examples, the support component can comprise a top surface having one or more dedicated locations for supporting at least a portion of at least one arm of the user.

In some examples, the support component can comprise a top surface having one or more dedicated locations for supporting at least a portion of hips of the user.

In some examples, the support component can comprise a top surface having one more dedicated locations for supporting at least a portion of torso of the user.

In some examples, the support component can comprise a top surface having one more dedicated locations for supporting at least a portion of back of the user.

It is to be understood herein the multipurpose physical exercise device of the kit according to the third aspect of the presently disclosed subject matter can comprise one or more features of the multipurpose physical exercise device according to any one of the first and the second aspects of the presently disclosed subject matter.

EMBODIMENTS

A more specific description is provided in the Detailed Description whilst the following are non-limiting examples of different embodiments of the presently disclosed subject matter.

1. A multipurpose physical exercise device comprising: an inflatable base which at least when inflated comprises a curved bottom portion having a first interior volume, a second interior volume isolated from the first interior volume, and an exterior curved bottom surface configured for rolling on an external surface, said second interior volume constituting a weight accommodating portion and being accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for removing therefrom a weight filler; and an upper platform being more rigid than the curved bottom portion and fixed to the inflatable base, said upper platform being configured to at least indirectly support a body part of a user while the user performs an exercise with said multipurpose physical exercise device, at least a majority of said second interior volume being positioned closer to an apex of the curved bottom surface than to the upper platform.

2. The device according to Embodiment 1, said second interior volume being an enclosed volume fixed with respect to the curved bottom portion.

3. The device according to Embodiment 1 or 2, further comprising a weightfilling port in communication with the second interior volume and the exterior of the curved bottom portion, said second interior volume being accessible through said weight filling port.

4. The device according to any one of Embodiments 1 to 3, said second interior volume being configured for repeatedly introducing thereinto and optionally removing therefrom the weight filler.

5. The device according to any one of Embodiments 1 to 4, said second interior volume being configured for introducing thereinto and optionally removing therefrom a different weight filler during one or more of said repetitions. 6. The device according to any one of Embodiments 1 to 5, wherein said second interior volume being configured for introducing thereinto the weight filler renders the inflatable base to be at least partially inflatable.

7. The device according to any one of Embodiments 1 to 6, said first interior volume being accessible from the exterior of the curved bottom portion for introducing thereinto an inflating filler.

8. The device according to Embodiment 7, further comprising an inflating port in communication with the first interior volume and the exterior of the curved bottom portion, said first interior volume being accessible through said inflating port.

9. The device according to Embodiment 7 or 8, wherein said first interior volume being configured for introducing thereinto the inflating filler renders the inflatable base to be at least partially inflatable.

10. The device according to any one of Embodiments 7 to 9, said first interior volume being configured for repeatedly introducing thereinto and optionally removing therefrom the inflating filler.

11. The device according to any one of Embodiments 7 to 10, said first interior volume being configured for introducing thereinto and optionally removing therefrom a different inflating filler during one or more of said repetitions.

12. The device according to any one of Embodiments 1 to 11, further comprising a partition wall isolating the first interior volume and the second interior volume.

13. The device according to any one of Embodiments 1 to 12, comprising a central axis passing through a center of curvature of the curved bottom surface and the apex of the curved bottom surface.

14. The device according to Embodiment 13, wherein the curved bottom surface is configured to roll on the external surface between an upright position of the device in which the central axis is perpendicular to the external surface and a tilted position of the device in which the central axis is at a tilt angle with the external surface.

15. The device according to Embodiment 14, wherein the tilt angle is less than 90°.

16. The device according to Embodiment 14, wherein the tilt angle is more than 90°. 17. The device according to any one of Embodiments 14 to 16, wherein the curved bottom surface maintains a point of contact with the external surface during said rolling.

18. The device according to any one of Embodiments 14 to 17, wherein the device is configured to be self-biased towards the upright orientation.

19. The device according to any one of Embodiments 14 to 18, wherein the weight accommodating portion, at least upon receiving therewithin the weight filler, is configured to bias the device towards the upright orientation.

20. The device according to Embodiment 19, wherein the weight accommodating portion, at least upon receiving therewithin the weight filler having a weight equal to or greater than that of a combined weight of the upper platform and a weight within the first volume, is configured to bias the device towards the upright orientation.

21. The device according to any one of Embodiments 14 to 20, wherein when the weight filler is filled into the weight accommodating portion, a center of mass of the device lies on the central axis and closer to the apex than to the upper platform.

22. The device according to any one of Embodiments 1 to 21, wherein the curved bottom portion comprises an uppermost edge being positioned opposite to the apex of the curved bottom surface, said inflatable base further comprising a neck portion having a neck lower edge connected at the uppermost edge of the curved bottom portion and an opposite neck upper edge, said neck lower edge having a neck lower diameter and said neck upper edge having a neck upper diameter smaller than the neck lower diameter.

23. The device according to Embodiment 22, wherein the neck lower diameter is equal to a diameter of the uppermost edge of the curved bottom portion.

24. The device according to Embodiment 22 or 23 , wherein the upper platform has a platform diameter being smaller than the neck lower diameter.

25. The device according to any one of Embodiments 22 to 24, wherein the curved bottom portion and the neck portion constitute a unitary body.

26. The device according to any one of Embodiments 1 to 25, wherein the inflatable base comprises a rim configured for fixing thereto the upper platform.

27. The device according to Embodiment 26, when dependent on Embodiment 22, said rim being fixed at the neck portion. 28. The device according to Embodiment 27, said rim being more rigid than the neck portion.

29. The device according to any one of Embodiments 26 to 28, said rim being more rigid than the curved bottom portion.

30. The device according to any one of Embodiments 26 to 29, wherein the rim circumferentially supports the upper platform.

31. The device according to any one of Embodiments 1 to 30, wherein the upper platform at least partially protrudes outwardly from the curved bottom portion.

32. The device according to any one of Embodiments 1 to 31, wherein the upper platform is configured for detachably mounting thereto at least one support component configured to support the body part of the user.

33. The device according to Embodiment 32, wherein the upper platform comprises at least partially a mounting arrangement for allowing said mounting of the at least one support component thereto.

34. The device according to Embodiment 33, wherein the mounting arrangement comprises a quick-fit arrangement.

35. The device according to any one of Embodiments 1 to 34, further comprising one or more attachment elements for detachably attaching thereto an exercise assisting equipment including one or more of a strap, band, rope, and belt.

36. The device according to Embodiment 35, wherein the attachment elements include hooks.

37. The device according to Embodiment 35 or 36, wherein the attachment elements are positioned at the inflatable base.

38. The device according to Embodiment 35 or 36, wherein the attachment elements are positioned at the upper platform.

39. The device according to any one of Embodiments 1 to 38, wherein said curved bottom portion is spherical and constitutes at least a half of a sphere.

40. The device according to any one of Embodiments 1 to 39, wherein a distance between an upper surface of the upper platform and an apex of the curved bottom surface is 40 cm to 45 cm.

41. A multipurpose physical exercise device comprising: a base at least selectively comprising a curved bottom portion having an exterior curved bottom surface configured for rolling on an external surface, said curved bottom portion comprising an uppermost edge being positioned opposite to an apex of the curved bottom surface, said base further comprising a neck portion having a neck lower edge connected at the uppermost edge of the curved bottom portion and an opposite neck upper edge, said neck lower edge having a neck lower diameter and said neck upper edge having a neck upper diameter smaller than the neck lower diameter; and an upper platform being more rigid than the curved bottom portion and fixed to the base, said upper platform having a platform diameter smaller than the neck lower diameter, said upper platform being configured to at least indirectly support a body part of a user while the user performs an exercise with said multipurpose physical exercise device.

42. The device according to Embodiment 41 , wherein the neck lower diameter is equal to a diameter of the uppermost edge of the curved bottom portion.

43. The device according to Embodiment 41 or 42, wherein the curved bottom portion and the neck portion constitute a unitary body.

44. The device according to any one of Embodiments 41 to 43, wherein the base comprises a rim configured for fixing thereto the upper platform.

45. The device according to Embodiment 44, said rim being fixed at the neck portion.

46. The device according to Embodiment 45, said rim being more rigid than the neck portion.

47. The device according to any one of Embodiments 44 to 46, said rim being more rigid than the curved bottom portion.

48. The device according to any one of Embodiments 44 to 47, wherein the rim circumferentially supports the upper platform.

49. The device according to any one of Embodiments 41 to 48, wherein the upper platform at least partially protrudes outwardly from the curved bottom portion.

50. The device according to any one of Embodiments 41 to 49, said curved bottom portion having a first interior volume and a second interior volume isolated from the first interior volume, said second interior volume constituting a weight accommodating portion and being accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for removing therefrom a weight filler, at least a majority of said second interior volume being positioned closer to an apex of the curved bottom surface than to the upper platform. 51. The device according to Embodiment 50, said second interior volume being an enclosed volume fixed with respect to the curved bottom portion.

52. The device according to Embodiment 50 or 51, further comprising a weight-filling port in communication with the second interior volume and the exterior of the curved bottom portion, said second interior volume being accessible through said weight filling port.

53. The device according to any one of Embodiments 50 to 52, said second interior volume being configured for repeatedly introducing thereinto and optionally removing therefrom the weight filler.

54. The device according to any one of Embodiments 50 to 53, said second interior volume being configured for introducing thereinto and optionally removing therefrom a different weight filler during one or more of said repetitions.

55. The device according to any one of Embodiments 50 to 54, wherein said second interior volume being configured for introducing thereinto the weight filler renders the base to be at least partially inflatable.

56. The device according to any one of Embodiments 50 to 55, said first interior volume being accessible from the exterior of the curved bottom portion for introducing thereinto an inflating filler.

57. The device according to Embodiment 56, further comprising an inflating port in communication with the first interior volume and the exterior of the curved bottom portion, said first interior volume being accessible through said inflating port.

58. The device according to Embodiment 56 or 57, wherein said first interior volume being configured for introducing thereinto the inflating filler renders the base to be at least partially inflatable.

59. The device according to any one of Embodiments 56 to 58, said first interior volume being configured for repeatedly introducing thereinto and optionally removing therefrom the inflating filler.

60. The device according to any one of Embodiments 56 to 59, said first interior volume being configured for introducing thereinto and optionally removing therefrom a different inflating filler during one or more of said repetitions.

61. The device according to any one of Embodiments 50 to 60, further comprising a partition wall isolating the first interior volume and the second interior volume. 62. The device according to any one of Embodiments 41 to 61, comprising a central axis passing through a center of curvature of the curved bottom surface and the apex of the curved bottom surface.

63. The device according to Embodiment 62, wherein the curved bottom surface is configured to roll on the external surface between an upright position of the device in which the central axis is perpendicular to the external surface and a tilted position of the device in which the central axis is at a tilt angle with the external surface.

64. The device according to Embodiment 63, wherein the tilt angle is less than 90°.

65. The device according to Embodiment 63, wherein the tilt angle is more than 90°.

66. The device according to any one of Embodiments 63 to 65, wherein the curved bottom surface maintains a point of contact with the external surface during said rolling.

67. The device according to any one of Embodiments 63 to 66, wherein the device is configured to be self-biased towards the upright orientation.

68. The device according to any one of Embodiments 63 to 67, when dependent on Embodiment 50, wherein the weight accommodating portion, at least upon receiving therewithin the weight filler, is configured to bias the device towards the upright orientation.

69. The device according to Embodiment 68, wherein the weight accommodating portion, at least upon receiving therewithin the weight filler having a weight equal to or greater than that of a combined weight of the upper platform and a weight within the first volume, is configured to bias the device towards the upright orientation.

70. The device according to any one of Embodiments 63 to 69, wherein when the weight filler is filled into the weight accommodating portion, a center of mass of the device lies on the central axis and closer to the apex than to the upper platform.

71. The device according to any one of Embodiments 41 to 70, wherein the upper platform is configured for detachably mounting thereto at least one support component configured to support the body part of the user. 72. The device according to Embodiment 71, wherein the upper platform comprises at least partially a mounting arrangement for allowing said mounting of the at least one support component thereto.

73. The device according to Embodiment 72, wherein the mounting arrangement comprises a quick-fit arrangement.

74. The device according to any one of Embodiments 41 to 73, further comprising one or more attachment elements for detachably attaching thereto an exercise assisting equipment including one or more of a strap, band, rope, and belt.

75. The device according to Embodiment 74 , wherein the attachment elements include hooks.

76. The device according to Embodiment 74 or 75, wherein the attachment elements are positioned at the base.

77. The device according to Embodiment 74 or 75, wherein the attachment elements are positioned at the upper platform.

78. The device according to any one of Embodiments 41 to 77, wherein said curved bottom portion is spherical and constitutes at least a half of a sphere.

79. The device according to any one of Clams 41 to 78, said base being inflatable, which when inflated comprises the curved bottom portion, thereby selectively comprising the curved bottom portion.

80. The device according to any one of Embodiments 41 to 79, wherein a distance between an upper surface of the upper platform and an apex of the curved bottom surface is 40 cm to 45 cm.

81. A physical exercise kit comprising: a multipurpose physical exercise device comprising: a base at least selectively comprising a curved bottom portion having an exterior curved bottom surface configured for rolling on an external surface; and an upper platform being more rigid than the curved bottom portion and fixed to the base, said upper platform being configured for detachably attaching thereto a support component; and one or more support components, each configured to be detachably attached to the upper platform and to support a body part of a user while the user performs an exercise with the multipurpose physical exercise device. 82. The kit according to Embodiment 81, wherein the support component comprises a top surface having one or more dedicated locations for supporting at least a portion of at least one leg of the user.

83. The kit according to Embodiment 81, wherein the support component comprises a top surface having one or more dedicated locations for supporting at least a portion of at least one arm of the user.

84. The kit according to Embodiment 81, wherein the support component comprises a top surface having one or more dedicated locations for supporting at least a portion of hips of the user.

85. The kit according to Embodiment 81, wherein the support component comprises a top surface having one more dedicated locations for supporting at least a portion of torso of the user.

86. The kit according to Embodiment 81, wherein the support component comprises a top surface having one more dedicated locations for supporting at least a portion of back of the user.

87. The kit according to any one of Embodiments 81 to 86, wherein the multipurpose physical exercise device comprises one or more features of the multipurpose physical exercise device according to any one of Embodiments 1 to 80.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to better understand the subject matter that is disclosed herein and to exemplify how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:

FIG. 1 illustrates an isometric view of a multipurpose physical exercise device according to an example of the presently disclosed subject matter;

FIG. 2 illustrates a cross-section taken along line X-X in FIG. 1;

FIG. 3 illustrates an isometric view of a multipurpose physical exercise device according to another example of the presently disclosed subject matter;

FIG. 4 illustrates a side view of the multipurpose physical exercise device of FIG. 2;

FIG. 5A illustrates an isometric view of a multipurpose physical exercise device according to yet another example of the presently disclosed subject matter; FIG. 5B illustrates a cross-section taken along line Y-Y in FIG. 5A;

FIG. 5C illustrates a partially exploded view of the multipurpose physical exercise device of FIG. 5A;

FIG. 5D illustrates a side view of the multipurpose physical exercise device of FIG. 5 A in its upright orientation;

FIG. 5E illustrates a side view of the multipurpose physical exercise device of FIG. 5 A in its tilted orientation;

FIG. 5F illustrates a side view of the multipurpose physical exercise device of FIG. 5 A in another tilted orientation;

FIG. 6A illustrates an isometric view of a physical exercise kit according to yet another example of the presently disclosed subject matter;

FIG. 6B illustrates the physical exercise kit of FIG. 6A showing its multipurpose physical exercise device and support component detached from each other;

FIG. 6C illustrates an isometric view of a physical exercise kit according to yet another example of the presently disclosed subject matter;

FIG. 6D illustrates an isometric view of a physical exercise kit according to yet another example of the presently disclosed subject matter; and

FIG. 6E illustrates an isometric view of a physical exercise kit according to yet another example of the presently disclosed subject matter.

DETAILED DESCRIPTION OF EMBODIMENTS

With reference to FIGS. 1 and 2, an exemplary embodiment of a multipurpose physical exercise device 1 (interchangeably referred to herein as device 101) comprising an upper platform 2 and a base 3, which in the illustrated example is formed of a unitary body, on which the platform 2 is mounted, is described. In some examples, the base 3 may be formed of two or more parts joined together, which may or may not constitute a unitary body. The base 3 comprises a truncated spherical outer surface constituting at least half of a sphere forming a curved bottom surface 4 of a curved bottom portion 5. The device 1 has a central axis 11, which in the illustrated example is perpendicular to the upper platform 2, extending vertically in an upright orientation. The central axis 11 passes through a center of curvature 4A of the curved bottom surface 4 and an apex 13 thereof. In some examples, the central axis 11 may not be perpendicular to the upper platform 2, for example, the upper platform 2 may be tilted at an angle other than 90° with respect to the central axis 11. The base 3 is configured whereby the central axis 11 is tiltable such that the curved bottom surface 4 rolls on an external surface and maintains a point of contact with the external surface while the device, i.e. the central axis 11, is rotated at an angle up to at least 90° relative to the upright orientation in any direction around the upright orientation to perform musculoskeletal stretches with a complete range of motion.

It is to be understood herein that the external surface can be any surface allowing the curved bottom surface 4 to roll thereupon and can include, for example, a platform, floor, ground, etc. and all these terms have been used interchangeably herein for the purposes of the present description.

In some exemplary embodiments, the curved bottom surface 4 has a cross section with a contour constituting at least a half of a circle, preferably the curved bottom surface 4 is spherical and constitutes at least a half of a sphere, ideally about half of a sphere to ensure that musculoskeletal stretches can be performed with a complete range of motion. The shape of the base 3 is configured to be rotatable such that the curved bottom surface 4 maintains a point of contact with the ground while the central axis 11 is rotated up to at least 90° in any direction relative to the upright orientation (described in detail with respect to the example of the multipurpose physical exercise device described and illustrated with reference to FIGS. 5 A to 5F). In some embodiments, the upper platform 2 is rigid to enable use as a balance board, but in alternative embodiments the upper platform 2 comprises a flexible material to provide a more comfortable surface for arms and legs during other exercises. In some embodiments, the upper platform 2 being rigid means that the upper platform is more rigid than the curved bottom portion 5 and is configured to at least indirectly support a body part of a user while the user performs an exercise with said multipurpose physical exercise device. For instance, the upper platform 2 can itself support the body part of the user or can be configured for attaching thereto a support component that supports the body part of the user (described in detail further below with reference to FIGS. 6 A to 6E). In some examples, the upper platform can comprise at least partially a mounting arrangement for allowing the mounting of the support component thereto. In some examples, the mounting arrangement can comprise a quick-fit arrangement including a snap-fit attachment arrangement and/or a VELCRO connection arrangement with one connecting element being fixed at the upper platform 2 and another corresponding connection element being fixed at the support component. In some examples, the platform 2 can be rigid and may include a flexible material on an upper surface 12 thereof to provide a more comfortable surface for arms and legs during other exercises.

In some embodiments, a distance between the upper surface 12 of the upper platform 2 and the apex 13 of the curved bottom surface 4 is configured to enable a user laying on the ground to place their calves on the upper platform 2, whilst keeping both their hips and knees at about 90° or more, i.e. at least 40 cm, preferably between 40 cm and 45 cm, and more preferably about 43 cm off the ground.

In some embodiments, a distance between the upper surface 12 of the upper platform 2 and the apex 13 of the curved bottom surface 4 may be configured to enable a user to rest their forearms on the upper platform 2 while performing a plank exercise, i.e., at least 40 cm, preferably between 40 cm and 45 cm, and more preferably about 43 cm off the ground.

In the exemplary embodiment illustrated in FIGS. 1 and 2, the diameter of the upper platform 2 is smaller than a diameter of an uppermost and outermost portion 14 of the curved bottom surface 4, which enables the device 1 to rotate up to at least 90° from the vertical position to perform musculoskeletal stretches with a complete range of motion. The base 3 includes a rim portion 15 that extends upwardly beyond the curved bottom surface 4 for connecting to the upper platform 2 without penetrating an interior of the curved bottom surface 4. In some embodiments, the rim portion 15 comprises a ring circumferentially supporting the upper platform 2 with through holes arranged there along, but other means of connecting the upper platform 2 to the rim portion 15 are possible. Accordingly, the upper platform 2 can be easily removed and reattached for cleaning and/or replacement with a different upper platform, e.g. with a different color and/or texture. The unitary body of the base 3 includes a tapering, e.g. narrowing, neck portion 16 extending between the curved bottom surface 4 and the rim portion 15, again enabling the device 1 to rotate up to at least 90° from the vertical position to perform musculoskeletal stretches with a complete range of motion (described in detail with respect to the example of the multipurpose physical exercise device described and illustrated with reference to FIGS. 5A to 5F). The curved bottom portion 5 comprises the uppermost edge 14 being positioned opposite to the apex 13 of the curved bottom surface 4. The neck portion 16 has a neck lower edge 16A connected at the uppermost edge 14 of the curved bottom portion 5 and an opposite neck upper edge 16B. The neck lower edge 16A has a neck lower diameter DI and the neck upper edge has a neck upper diameter D2 smaller than the neck lower diameter DI. The neck lower diameter DI is equal to a diameter D3 of the uppermost edge 14 of the curved bottom portion 5. The upper platform 2 has a platform diameter D4 smaller than the neck lower diameter DI and hence smaller than the diameter D3 of the uppermost edge 14 of the curved bottom portion 5.

In the illustrated example, the curved bottom portion 5 and the neck portion 16 constitute a unitary body. In some examples, the curved bottom portion 5 and the neck portion 16 may be formed separately and joined together, which may or may not constitute a unitary body.

It is to be further understood that irrespective of whether the base 3 includes or not the neck portion 16, the upper platform 2 is so attached to the base 3, for example, via the rim portion 15 to protrude outwardly from the curved bottom portion 5. In other words, in all the examples, i.e., with or without the neck portion and with or without the rim portion, the upper platform 2 protrudes outwardly from the base 3 and the curved bottom portion 5, such that a user can position a body part onto the upper platform while the remaining body of the user can be protruding beyond the edges of the upper platform. In further other words, in all the examples, i.e., with or without the neck portion and with or without the rim portion, the upper platform 2 protrudes outwardly from the base 3 and the curved bottom portion 5, i.e., at least a part of the upper platform that is to support the body part of the user is positioned outside the curvature of the curved bottom portion 5.

In one exemplary embodiment, the base 3 is comprised of an elastic or stretchable material, such as rubber, and be configured with suitable openings and valves enabling the base 3 to be deflatable into a storage size and inflatable into a use arrangement (as shown). The base 3 may be manufactured by rotomolding, and may be symmetrical about the central axis in 360° providing an easy and inexpensive method of manufacturing. However, the base 3 may be fabricated from other suitable materials and by other suitable processes. The rim portion 15 and/or the neck portion 16 may be rigid with respect to the curved bottom surface 4.

The curved bottom portion 5 comprises a first interior volume 17 and a second interior volume 21 isolated from the first interior volume 17 by a partition wall 18. The second interior volume 21 constitutes a weight accommodating portion 21 and is accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for removing therefrom a weight filler. In some examples, the weight accommodating portion may be configured for not allowing removal of the weight filler therefrom. At least a majority of the second interior volume 21 is positioned closer to the apex 13 of the curved bottom surface 4 than to the upper platform 2. In other words, the center of mass of the weight filler when filled into the weight accommodating portion 21 lies closer to the apex 13 than to the upper platform 2 and on the central axis 11. The second interior volume 21 is an enclosed volume fixed with respect to the curved bottom portion 5. For instance, the enclosed second interior volume 21 remains in its position even when the device 1 is tilted from the upright orientation.

The second interior volume 21 is accessible for introducing and optionally removing the weight filler through a weight filling port 22 in communication with the second interior volume 21 and the exterior of the curved bottom portion 5. The weight filler can be any fluid or powdered solid such as sand. The weight accommodating portion 21 when filled with a weight equal to or greater than the total weight in the remaining portion of the device 1, i.e., the combined weight of the upper platform 2 and the weight within the first interior volume 17, biases the device 1 towards its upright orientation when tilted therefrom.

In some examples, the device 1 can be configured to be self-biased into its upright orientation, i.e., without the weight filler. For instance, the portion of the curved bottom surface 4 in proximity to the apex 13 may be heavier than the remaining portion thereof to self-bias the device 1 towards its upright orientation.

The above-mentioned biasing (either self-bias or by virtue of the weight filler) prevents the device from unintentional rolling on the ground, provides a stable initial position for exercising, as well as provides resistive force against rolling by the user while performing the exercise thereby increasing the difficulty level of the exercise to render a more efficient work-out. The difficulty level of the exercise, based on the user preference, can be manipulated by introducing the weight filler according to the required weight. The second interior volume 21 is configured for repeatedly introducing thereinto and removing therefrom the weight filler, and optionally with different weight filler or with different volume of the same weight filler to regulate the weight within the weight accommodating portion 21. In some examples, the weight accommodating portion may be configured for not allowing removal of the weight filler therefrom. In some examples, the second interior volume can be bound by rigid walls on all sides. In some examples, the second interior volume can be at least partially bound by flexible walls that get inflated by the weight filler, thereby rendering the base to be at least partially inflatable. For instance, introducing the weight filler may inflate the weight accommodating portion thereby at least partially inflating the base.

The weight accommodating portion 21 may be configured into various shapes and sizes to accommodate different forms of weight fillers. In the illustrated embodiment, the weight accommodating portion 21 has a gradually increasing diameter extending from the apex 13 towards the center of the base 3, which provides a better weight distribution, e.g. towards the apex 13. In some examples, the weight accommodating portion can have a curved shape to constitute a part of the curved bottom portion (as shown in FIGS. 5 A to 5F).

In some examples, the first interior volume 17 is accessible from the exterior of the curved bottom portion 5 for introducing thereinto an inflating filler through an inflating port 19 in communication with the first interior volume 17 and the exterior of the curved bottom portion 5. In the illustrated example, the inflating port is formed in an upper surface 6 of the base 3 and is accessible via a through-hole 2 A formed in the upper platform 2. In some examples, the inflating port 19 can be formed at any other location on the base 3. The inflating filler can be any fluid including air or liquid, or any powdered solid.

In some examples, the first interior volume can be bound by rigid walls on all sides. In some examples, the first interior volume can be at least partially bound by flexible walls that get inflated by the inflating filler, thereby rendering the base to be at least partially inflatable. For instance, introducing the inflating filler may inflate the walls of the first interior volume thereby at least partially inflating the base. In some examples, the first interior volume can be deflated via the inflating port and can be repeatedly filled and emptied by a same or different inflating filler or by a different volume of an inflating filler in every repetition.

In some examples, the first interior volume may be filled only once thereby inflating the base 3 and may not be deflatable thereafter. Accordingly, for the purposes of the present description, the term “inflatable” is to be understood as including within its meaning inflating during manufacturing and being sold in the inflated state. Accordingly, for the purposes of the present description, the phrase “at least selectively comprising a curved bottom portion” is to be understood as at least temporarily, i.e., when the base is selectively inflatable and deflatable, comprising the curved bottom portion. In other, words, the phrase “at least selectively comprising a curved bottom portion” is to be understood as either temporarily, i.e., when the base is selectively inflatable and deflatable, comprising the curved bottom portion or permanently, i.e., when the base is inflated during manufacturing and is sold as is and is not deflatable, comprising the curved bottom portion. In the examples in which the base temporarily comprises the curved bottom portion, it is to be understood that the base selectively comprises the curved bottom portion, i.e., only when inflated, while upon being deflated (for example for storing or transporting), the base does not comprise the curved bottom portion.

In some examples, the device can further comprise one or more attachment elements for detachably attaching thereto an exercise assisting equipment including one or more of a strap, band, rope, and belt. In some examples, the attachment elements can be positioned at the base and/or the upper platform. The one or more attachment elements have been illustrated and described in detail with reference to the example of the multipurpose physical exercise device illustrated in FIGS. 5 A to 5F.

With reference to FIGS. 3 and 4, an exemplary embodiment of a multipurpose physical exercise device 31 comprising an upper platform 32; and a base 33 formed of a unitary body including the upper platform 32. The base 33 comprises a truncated spherical outer surface constituting at least half of a sphere forming a curved bottom surface 34. The device 31 has a central axis 41 perpendicular to the upper platform 32 and extending vertically in an upright orientation. The base 33 is configured whereby the central axis 41 is tiltable such that the curved bottom surface 34 maintains a point of contact with the ground while the device, i.e. the central axis 41, is rotated at an angle up to at least 90° relative to the upright orientation in any direction around the upright orientation.

In some exemplary embodiments, the curved bottom surface 34 has a cross section with a contour constituting at least a half of a circle, preferably the curved bottom surface 34 is spherical and constitutes at least a half of a sphere, ideally about half of a sphere. The shape of the base 33 is configured to be rotatable such that the curved bottom surface 34 maintains a point of contact with the ground while the central axis 41 is rotated up to at least 90° in any direction relative to the upright orientation (FIG. 4). In some embodiments, the upper platform 32 is rigid, but in alternative embodiments the upper platform 32 comprises a flexible material. In some embodiments, a distance between an upper surface of the upper platform 32 and an apex 43 of the curved bottom surface 34 is configured to enable a user laying on the ground to place their calves on the upper platform 32, whilst keeping both their hips and knees at about 90° angles or more, i.e. at least 40 cm, preferably between 40 cm and 45 cm, and more preferably about 43 cm off the ground.

In some embodiments, a distance between the upper surface 42 of the upper platform 32 and the apex 43 of the curved bottom surface 34 may be configured to enable a user to rest their forearms on the upper platform 32 while performing a plank exercise, i.e. at least 40 cm, preferably between 40 cm and 45 cm, and more preferably about 43 cm off the ground.

In the exemplary embodiment illustrated in FIGS. 3 and 4, the diameter of the upper platform 32 is smaller than a diameter of an uppermost and outermost portion 44 of the curved bottom surface 34. The unitary body of the base 33 includes a tapering, e.g. narrowing, neck portion 46 extending between the curved bottom surface 34 and the upper platform 32.

In the exemplary embodiment, the base 33 is comprised of an elastic or stretchable material, such as rubber, and be configured with suitable openings and valves enabling the base 33 to be deflatable into a storage size and inflatable into a use arrangement (as shown). The base 33 may be manufactured by rotomolding, and may be symmetrical about the central axis in 360°. However, the base 33 may be fabricated from other suitable materials and by other suitable processes. The neck portion 16 may be rigid with respect to the curved bottom surface 34.

In some embodiments, the base 33 is self-biased to an upright position in which the platform 32 is generally parallel to the ground, and the central axis 41 is perpendicular to the ground. In order to provide the self-biasing, in some embodiments the base 33 comprises a weight accommodating portion 41. The weight accommodating portion 41 may be adjacent to the apex 13 of the curved bottom surface 34. The weight accommodating portion 41 may be configured into various shapes and sizes to accommodate different forms of weights. In some embodiments, the weight accommodating portion 41 is configured, e.g. with openings, valves and/or plugs, to accommodate water. In some embodiments the weight accommodating portion 41 is configured to accommodate sand, e.g. with openings, valves and/or plugs. A centerpiece 51 or pedestal extends upwardly from the upper platform 32, preferably from the center thereof along the central axis 41. The centerpiece 51 provides a handle for carrying, and enables a user’s legs to lock onto the device 31 during exercise. The centerpiece 51 may be detachably attachable to the platform 32 via connectors, e.g. threaded or snap fit connectors, on both the centerpiece 51 and the platform 32. The centerpiece 51 may comprise a cylindrical rod 52 and extend 6” to 12”, but other shapes and sizes are within the scope of the invention. The centerpiece 51 may further include a flat piece 53 connected to an outer end of the rod 52. In the illustrated embodiment, the flat piece 53 is circular with a diameter of 6” to 12”, but other shapes and sizes are within the scope of the invention.

With reference to FIGS. 5 A to 5F, an exemplary embodiment of a multipurpose physical exercise device 101 (interchangeably referred to herein as device 101) is described. It is to be understood herein that in various examples, the device 101 can include some or all of the features of the multipurpose physical exercise device 1 described above with reference to FIGS. 1 and 2 and/or the multipurpose physical exercise device 31 described above with reference to FIGS. 3 and 4. The device 101 comprises an upper platform 102 and a base 103. The base 103 has been illustrated as being inflated in FIGS. 5A to 5F, thereby comprising a curved bottom portion 105 having a curved bottom surface 104, which is configured to roll on the ground G, as illustrated in FIGS. 5D, 5E, and 5F to assist a user in performing an exercise, in a similar manner as described above with respect to the device 1. For instance, the user can position a body part, for example, legs, arms, back, torso, hips, etc. on the upper platform 102 and roll the device 101 on the ground G to perform an exercise. In other examples, the device 101 may be used to perform one or more exercises that do not require rolling the device 101. In some examples, the device 101 can be inverted (with respect to the orientation shown in FIG. 5D), whereas the upper platform can be positioned on the ground and the base, when inflated can be used to support a body part of the user when the user performs an exercise using the device 101.

In the examples in which the base 103 is placed on the floor and the upper platform is used to support a body part of the user, one or more support components can be detachably attached to an upper surface 112 of the upper platform 102 for supporting different body parts of the user corresponding to the exercise to be performed using the device 101, as described in detail further herein below with reference to FIGS. 6 A to 6E. The curved bottom portion 105 comprises a curved bottom surface 104 configured to roll on the ground G while maintaining a point of contact with the ground G during the rolling. The device 101 has a central axis 111 passing through a center of curvature 104A of the curved bottom surface 104 and an apex 113 of the curved bottom surface 104. The curved bottom surface 104 is configured to roll on the ground G between an upright position (FIG. 5D) of the device 101 in which the central axis 111 is perpendicular to the ground G and a tilted position (FIGS. 5E and 5F) of the device 101 in which the central axis 111 is at a tilt angle A with the ground G. It is to be understood herein that any position between that shown in FIG. 5D and that shown in FIG. 5E or 5F is to be also considered as the tilted position.

In the upright position as shown in Fig. 5D, the upper surface 112 of the upper platform 102 is parallel to the ground G and the angle A between the central axis 111 and the ground G is 90°. When the curved bottom surface 104 is rolled on the ground G, to be in the tilted position shown in FIG. 5E, the angle A between the central axis 111 and the ground G is 0°, i.e., the central axis 111 extends parallel to the ground G. The angle A between the central axis 111 and the ground G is 90° can be any angle between 0° and 90°. In case the curved bottom surface 104 is rolled on the ground G in a direction opposite to as shown in Fig. 5E, the angle A between the central axis 111 and the ground G is 90° can be greater than 90°. It is to be understood that the angle A being greater than 90° is to be considered with respect to that portion of the ground with respect to which the angle A is measured in FIG. 5E. As shown in Fig. 5F, the curved bottom surface 104 can be rolled on the ground G further from than shown in FIG. 5E, for example by virtue of the space S between the ground G and the upper platform 102 in the tilted position shown in FIG. 5E, described in detail herein below.

In the illustraed example, the base 103 comprises a neck portion 116 having a neck lower edge 116A connected at an uppermost edge 114 of the curved bottom portion 105 and an opposite neck upper edge 116B . The neck portion 116 converges in a direction extending upwards from the curved bottom portion 105 towards the upper platform 102. In other words, a neck lower diameter DI at the neck lower edge 116A is smaller than a neck upper diameter D2 at the neck upper edge 116B. The neck lower diameter DI is equal to a diameter D3 of an uppermost edge 114 of the curved bottom portion 105.

The base 103 comprises a rim portion 115, which in the illustrated example, is fixed to the neck portion 116 at the neck upper edge 116B and is more rigid than the neck portion 116 to facilitate fixing the upper platform 102 to the base 103, for example, at the neck upper edge 116B. The rim portion 115 is rigid enough to facilitate fixing the upper platform 102 thereto and circumferentially support the upper platform 102.

It is to be understood herein that in some examples, the base 103 may not include the neck portion 116 and the rim portion 115 can be fixed at the uppermost edge 114. It is to be further understood that irrespective of whether the base 103 includes or not the neck portion 116, the upper platform 102 is so attached to the base 103, for example, via the rim portion 115 to protrude outwardly from the curved bottom portion 105. In other words, in all the examples, i.e., with or without the neck portion and with or without the rim portion, the upper platform 102 protrudes outwardly from the base 103 and the curved bottom portion 105, such that a user can position a body part onto the upper platform while the remaining body of the user can be protruding beyond the edges of the upper platform. In further other words, in all the examples, i.e., with or without the neck portion and with or without the rim portion, the upper platform 102 protrudes outwardly from the base 103 and the curved bottom portion 105, i.e., at least a part of the upper platform that is to support the body part of the user is positioned outside the curvature of the curved bottom portion 105.

In the illustrated example, the upper platform 102 is attached at the rim portion 115, which is fixed to the neck upper edge 116B, and has a platform diameter D4 which is smaller than the neck lower diameter DI as well as the diameter D3 of the uppermost edge 114 of the curved bottom portion 105.

The platform diameter D4 being smaller than the diameter D3 of the uppermost edge 114 of the curved bottom portion 106 allows the space S between the ground G and the upper platform 102 in the tilted position shown in FIG. 5E, thereby allowing further tilting of the device 101 from the position shown in FIG. 5E in which the central axis is parallel to the ground. This increases the extent of tilting of the device 101 with the upper platform 102 being at a specific height from the ground G, which in the illustrated example is 40 cm to 45 cm in the upright orientation of the device 101. In other words, to increase the extent of tilting of the device 101, the height of the upper platform 102 from the ground G in the upright orientation need not be increased. In further other words, a wider extent of tilt is possible with the upper platform 102 being at a certain height as compared to the extent of tilt that could be achieved with the platform diameter D4 being equal to or greater than the diameter D3 of the uppermost edge 114 of the upper curved portion 106. Further, as can be seen in FIGS. 5A to 5F, the curved bottom portion 105 is spherical and constitutes more than half of a sphere thereby allowing the above-described extent of tilting. The increased extent of tilting of the device 101 renders the device 101 more effective for performing the exercises.

The curved bottom portion 105 comprises a first interior volume 117 and a second interior volume 121 isolated from the first interior volume 117 by a partition wall 118. The second interior volume 121 constitutes a weight accommodating portion 121 and is accessible from an exterior of the curved bottom portion for introducing thereinto and optionally for removing therefrom a weight filler. In some examples, the weight accommodating portion may be configured for not allowing removal of the weight filler therefrom. At least a majority of the second interior volume 121 is positioned closer to the apex 113 of the curved bottom surface 104 than to the upper platform 102. In other words, the center of mass of the weight filler when filled into the weight accommodating portion 121 lies closer to the apex 113 than to the upper platform 102 and on the central axis 111. The second interior volume 121 is an enclosed volume fixed with respect to the curved bottom portion 105. For instance, the enclosed second interior volume 121 remains in its position even when the device 101 is tilted from the upright orientation.

The weight accommodating portion 121 functions in a manner similar to that of the weight accommodating portion 21 described above with reference to the device 1 illustrated in FIGS. 1 and 2, and all of the description thereof provided above applies mutatis mutandis to the weight accommodating portion 121. For instance, the second interior volume 121 is accessible for introducing and optionally removing the weight filler through a weight filling port 122 in communication with the second interior volume 121 and the exterior of the curved bottom portion 105. The weight filler can be any fluid or powdered solid such as sand. The weight accommodating portion 121 when filled with a weight equal to or greater than the total weight in the remaining portion of the device 101, i.e., the combined weight of the upper platform 102 and the weight within the first interior volume 117, biases the device 101 towards its upright orientation when tilted therefrom.

In some examples, the device 101 can be configured to be self-biased into its upright orientation, i.e., without the weight filler. For instance, the portion of the curved bottom surface 104 in proximity to the apex 113 may be heavier than the remaining portion thereof to self-bias the device 101 towards its upright orientation. The above-mentioned biasing (either self-bias or by virtue of the weight filler) prevents the device from unintentional rolling on the ground, provides a stable initial position for exercising, as well as provides resistive force against rolling by the user while performing the exercise thereby increasing the difficulty level of the exercise to render a more efficient work-out. The difficulty level of the exercise, based on the user preference, can be manipulated by introducing the weight filler according to the required weight. The second interior volume 121 is configured for repeatedly introducing thereinto and removing therefrom the weight filler, and optionally with different weight filler or with different volume of the same weight filler to regulate the weight within the weight accommodating portion 121. In some examples, the weight accommodating portion may be configured for not allowing removal of the weight filler therefrom.

In the illustrated example, the second interior volume 121 has been shown to be bound by flexible wall 123 at the lower region (proximate to the apex 113) that gets inflated by the weight filler, thereby rendering the base 103 to be at least partially inflatable. For instance, introducing the weight filler inflates the weight accommodating portion 121 thereby at least partially inflating the base 103.

In the illustrated example, the first interior volume 117 is accessible from the exterior of the curved bottom portion 105 for introducing thereinto an inflating filler through an inflating port 119 in communication with the first interior volume 117 and the exterior of the curved bottom portion 105. In the illustrated example, the inflating port

119 is formed in an upper surface 106 of the base 103 and is accessible via a through- hole 102A formed in the upper platform 102. In some examples, the inflating port 119 can be formed at any other location on the base 103. The inflating filler can be any fluid including air or liquid, or any powdered solid.

In the illustrated example, the first interior volume 117 is bound by flexible wall

120 that gets inflated by the inflating filler, thereby rendering the base to be at least partially inflatable. For instance, introducing the inflating filler inflate the wall 120 of the first interior volume 117 thereby at least partially inflating the base 103. In some examples, the first interior volume 117 can be deflated via the inflating port 119 and can be repeatedly filled and emptied by a same or different inflating filler or by a different volume of an inflating filler in every repetition.

It is to be understood herein that for the device 101 to be stable and/or to be biased towards its upright orientation, the weight filler and the inflating filler should be selected so that the total weight in the weight accommodating portion 121 is equal to or greater than the combined weight of the inflating filler and the upper platform 102. In other words, the weight filler and the inflating filler should be selected so that a center of mass of the device 101 should lie closer to the apex 113 than to the upper platform 102 and on the central axis 111.

In the illustrated example, the wall 120 of the first interior volume 117 and the wall 123 of the second interior volume 121 have been shown to be separate and positioned together thereby constituting the curved bottom surface 104. In some examples, the wall 120 of the first interior volume 117 and the wall 123 of the second interior volume 121 can be unitarily formed.

In the illustrated example, both the first interior volume 117 and the second interior volume 121 are inflatable thereby rendering the base 103 inflatable. In some examples, at least one of the first interior volume 117 and the second interior volume 121 may not be inflatable. In the illustrated example, the base 103 includes the curved bottom portion 105 (as being curved) only when both the first interior volume 117 and the second interior volume 121 are inflated thereby constituting the curved bottom portion 105 and their respective exterior surfaces constituting the continuous curved bottom surface 104.

In some examples, the first interior volume may be filled only once thereby inflating the base 103 and may not be deflatable thereafter. Accordingly, for the purposes of the present description, the term “inflatable” is to be understood as including within its meaning inflating during manufacturing and being sold in the inflated state. Accordingly, for the purposes of the present description, the phrase “at least selectively comprising a curved bottom portion” is to be understood as at least temporarily, i.e., when the base is selectively inflatable and deflatable, comprising the curved bottom portion. In other, words, the phrase “at least selectively comprising a curved bottom portion” is to be understood as either temporarily, i.e., when the base is selectively inflatable and deflatable, comprising the curved bottom portion or permanently, i.e., when the base is inflated during manufacturing and is sold as is and is not deflatable, comprising the curved bottom portion. In the examples in which the base temporarily comprises the curved bottom portion, it is to be understood that the base selectively comprises the curved bottom portion, i.e., only when inflated, while upon being deflated (for example for storing or transporting), the base does not comprise the curved bottom portion. The device 101 further includes attachment elements 130 for detachably attaching thereto an exercise assisting equipment including one or more of a strap, band, rope, and belt. In the illustrated example, the attachment elements 130 comprises hook-receiving elements for receiving corresponding hooks attached at the ends of the exercise assisting equipment. In some examples, the attachment elements 130 can include any suitable structure for detachably attaching thereto an exercise assisting equipment. In some examples, the exercise assisting equipment can be one or more of a strap, band, rope, belt, etc. to be connected at the attachment elements 130, while the user can hold the exercise assisting equipment during the exercise. In the illustrated example, the attachment elements are positioned at the upper platform 102. In some examples, the attachment elements can be positioned at the base 103.

With reference to FIGS. 6A to 6E, various exemplary embodiments of a physical exercise kit 200 (interchangeably referred to herein as kit 200) comprising a multipurpose physical exercise device 201 (interchangeably referred to herein as device 201) and various support components is described. It is to be understood herein that in various examples, the device 201 can include some or all of the features of the multipurpose physical exercise device 1 described above with reference to FIGS. 1 and 2, the multipurpose physical exercise device 31 described above with reference to FIGS. 3 and 4, and/or the multipurpose physical exercise device 101 described above with reference to FIGS. 5 A to 5F.

According to the example illustrated in FIGS. 6A and 6B, the kit 200 includes multipurpose physical exercise device 201 and a support component 250 having a top surface 251. The top surface 251 has dedicated locations 252 conforming to the shape of a back or torso of the user to support the back or torso of the user when the user performs an exercise with the multipurpose physical exercise device 201 having the support component 250 mounted thereto.

According to the example illustrated in FIG. 6C, the kit 200 includes multipurpose physical exercise device 201 and a support component 260 having a top surface 261. The top surface 261 has dedicated locations 262 conforming to the shape of a back or torso of the user to support the back or torso of the user when the user performs an exercise with the multipurpose physical exercise device 201 having the support component 260 mounted thereto. The only difference between the top surface 251 and the top surface 261 being that the top surface 261 is more curved as compared to the top surface 251 to support the back or torso of the user for a particular exercise required the curved top surface.

According to the example illustrated in FIG. 6D, the kit 200 includes multipurpose physical exercise device 201 and a support component 270 having a top surface 271. The top surface 271 has dedicated locations 272 conforming to the shape of arms and/or legs of the user to support the arms or legs of the user when the user performs an exercise with the multipurpose physical exercise device 201 having the support component 270 mounted thereto.

According to the example illustrated in FIG. 6E, the kit 200 includes multipurpose physical exercise device 201 and a support component 280 having a top surface 281. The top surface 281 has dedicated locations 282 conforming to the shape of hips of the user to support the hips of the user (for example when the user sits on the top surface 281) when the user performs an exercise with the multipurpose physical exercise device 201 having the support component 280 mounted thereto.

It is to be understood herein that the top surfaces of all the support components can be soft and flexible to provide comfort to the body part of the user during the exercise.

It is to be further understood herein that the device 201 and the support components 250-280 can comprise at least partially a mounting arrangement (not shown) for allowing the mounting of the support component to the device 201. In some examples, the mounting arrangement can comprise a quick-fit arrangement including a snap-fit attachment arrangement and/or a VELCRO connection arrangement with one connecting element being fixed at the device and another corresponding connection element being fixed at the support component.

In some examples, the kit 200 can comprise the device 201 and one or more of the support components 250 to 280 to allow the user to perform various exercises using a corresponding different support component with the device 201.