an exercising device in the form of a shoe having a series of weighted sections adapted to be added or removed so as to selectively vary the weight of the shoe . the weighted sections have cooperating joinder elements which enable them to be nested longitudinally with respect to each other in a cantilevered fashion and then locked in place . a rounded heel section is provided to facilitate exercises comprising rocking movements of the foot . in an alternative embodiment , a cooperating platform shoe member is provided for attaching to the device so that ambulation is facilitated without requiring removal of the exercising device .