Abstract: An exercise system and method is utilized with a foot pedal of a stationary bicycle to exercise various body parts including the user's legs, arms, chest, shoulders, back, and abdomen for a complete body workout. The exercise system preferably includes an adapter and a plurality of user interfaces. The adapter is configured to releasably couple one of the foot pedals of the stationary bicycle and one of the plurality of user interfaces. A foot holder serves as one of the plurality of user interfaces. Preferably, the foot holder securely and releasably retains the user's foot. While in use, the user's foot is axially aligned with an axle of the foot pedal and is capable of supplying force to the foot pedal on both the down-stroke and up-stroke portions of the foot pedal's rotation. An external attachment also serves as one of the plurality of user interfaces. The external attachment is preferably designed to transmit force from the user's legs, arms, feet, or hands to the foot pedal of the stationary bicycle.