Abstract: An exerciser in one embodiment includes a base, a telescopic shank mechanism, a pivotal calf support disposed sufficiently above the ground by mounting on a top of the shank mechanism, and a foot support including a telescopic frame obliquely upwardly extending from one end of the calf support, and two cylindrical foot supporting members fixedly secured to both sides of the frame. The tops of the feet of an inverted person are urged against the foot supporting members, the backs of the calves and the knees are urged against the calf support, and the remaining portions of the body are disposed between the calf support and the reference ground in performing one form of exercise.