Position shoulders under padded bars. Place feet shoulder width apart directly under shoulders. Disengage lever brace if available.
Squat down by bending hips back while allowing knees to bend forward, keeping back straight and knees pointed same direction as feet. Descend until thighs are just past parallel to floor. Raise sled by extending knees and hips until legs are straight. Return and repeat.
Re-engage support lever in extended position before dismounting. Keep head facing forward, back straight and feet flat on floor; equal distribution of weight through forefoot and heel. Knees should point same direction as feet throughout movement. See Squat Analysis.