Start: Stand in a hack squat machine with your feet hip-width apart in the middle of the foot plate. Unhook the safety bar and support the weight with your legs.
Move: Slowly squat down until your hips and knees are at or just below a 90 degree angle. From there, stand back up by pressing through your heels to lift the weight to an upright position. Come almost to a full extension at the top without locking out your knees.
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