an exerciser provides low impact exercise for the upper and lower body of an operator . the apparatus includes an upper portion having moving rungs simulating a hand - over - hand motion to exercise one &# 39 ; s upper body and a lower portion having moving platforms simulating a stair - like climbing motion to exercise one &# 39 ; s lower body . the upper and lower portions are oriented at different angles to maximize user comfort , the angle of the lower portion in particular providing clearance for one &# 39 ; s knees during use . the exerciser also includes a variable speed control to adjustable vary the speed of the moving rungs and platforms , thereby adapting to the needs of various users .