Abstract: An exercise apparatus is disclosed which utilizes a crank shaft having two substantially U-shaped throw members. The orientation of each throw member is adjustable with respect to the other throw member, therefore allowing the crank shaft to assume two different configurations. The first setting results when one of the U-shaped throw members is secured in a position one hundred and eighty degrees offset with respect to the other gripping member. This configuration enables a motion similar to that of pedaling a bicycle as the user's arms (or legs) flex at different times. The second setting is obtained when both throw members are secured with their U-shapes facing the same direction. When so configured, the user's arms (or legs) flex simultaneously as both arms (or legs) push and pull at the same time. Each throw member is separable from each other and optionally includes weights positioned along its length.