Sit on machine with back on padded support. Place one foot high up on platform and other foot on floor below platform. Extend hip and knee. Release dock lever and grasp handles to sides.
Lower sled by bending leg until knee is just short of complete flexion. Return by extending knee and hip. Repeat. Continue with opposite leg.
Adjust safety brace and back support to accommodate near full range of motion without forcing pelvis to bend at waist. Keep knee pointed same direction as foot. Do not allow heel to raise off of platform, pushing with both heel and forefoot.