Abstract: An exercise and rehabilitation apparatus is provided having resistance load units comprising a resistance drum rotabably coupled to a user crank handle mechanism, a friction strap surrounds the resistance drum wherein the level of friction resistance between the drum and the resistance load unit housing is user selectable thereby selecting the force required to rotate the user crank. Once user adjusted the resistance load unit provides a constant load to the user crank. Resistance load units are mounted opposingly providing a left and right hand user crank. A variety of user crank embodiments are provided for simulating the forces and motion experienced by a user in various sporting, exercising and rehabilitation user activities.