To provide an exercise support device, an exercise support method and an exercise support program, capable of improving records by concretely grasping the exercise movement state of a user during sport or training to recognize the occurrence of a trouble in the exercise movement and improve the exercise movement state.

An interface device 100 acquires numerical values of a pace and a pitch during exercise movement as information showing an exercise movement state (running state) of a user US by a sensor 110 included therein, and performs analysis and determination processing for determining whether or not these numerical values are kept within a numerical value range which is an allowable range preset for a running distance. Accordingly, the device determines a trouble portion deviated from the preset numerical range in the exercise movement state at this current point of time of the user US, and based on the analysis result, allows a display part 131 provided in the interface device 100 to perform a notification operation according to the exercise movement state and the trouble portion during the exercise movement of the user US.