To add a load to a user's weight, effectively train the muscular strength of the inferior limbs, reduce body weight or the like particularly by passing a belt of synthetic resin or the like through a plurality of weights designed so as not to obstruct the motion of the waist, and attach the belt to the waist via a buckle or the like.

A belt 4 is passed through front weights 1 and 2, each having slits A, B and C, and H, I and J respectively at three positions for passing the belt 4, and a rear belt 3 having belt slits D, E, F and G at four positions, and used in such a state as attached to the waist with a buckle 5. Each of the weights 1 to 3 is formed to be semicylindrical, using a metal of inexpensiveness, high specific gravity and corrosion resistance such as lead, brass and iron. Furthermore, the part of the belt 4 is graduated for the easy recognition of an increase or a decrease in waist size at a glance. In this case, the belt 4 may be made of leather, but the use of synthetic resin or the like resistant against sweat and wrinkles is preferable. Also, the buckle 5 is preferably formed out of abrasion-resistant and strong stainless steel.