Abstract: A combination dumbbell and jump rope with interchangeable weight units is disclosed. Various weights may be quickly and easily attached or detached from the handles by pushing a button on the end of the weight unit. When pushed, the button releases ball bearings that lock the weight unit into grooves on the handle. The jump rope length is easily adjustable to accommodate each individual user by retracting a portion of the rope inside the hollow rope handles. Retraction is accomplished by the release of a variable-length clamping mechanism. When closed, the clamping mechanism presses ball bearings against the jump rope cable to hold it firmly in place. When released, the rope may move freely within a jump rope cable guide for length adjustment.