Adjust chest pad height so that pad rests comfortably between chest line and abdomen. Press chest firmly against pad, standing straight up with shoulders down and back and head as a natural extension of the spine. Grasp handles to assist with maintaining chest against pad. Place right foot on foot pedal, pedal should rest in the middle of the foot. Left foot will stay stationary with a slight bend in the knee. Exhale; extend foot pedal straight back, do not lock out the knee joint. Inhale; bend the knee and bring it slowly back to resting position towards the chest. Weight stack should stop just before resting level, pause and repeat to complete reps. Once reps complete, remove the right foot, adjust foot pedal to the left side. Repeat on the left.