Lie supine on platform with shoulders against pad. Place feet on platform. Prop one leg up, on support if available. Extend hip and knee of leg positioned on platform. Release dock lever and grasp handles to sides.
Bring sled toward platform by flexing hip and knee of supporting leg until knee is just short of complete flexion or until hip is completely flexed. Return by extending knee and hip. Repeat. Continue with opposite leg.
If available, re-engage support lever in extended position before dismounting. Allow for full range of motion without forcing hips to rise at waist. Keep knee pointed same directions as foot. Do not allow heel to raise off of platform, pushing with both heel and forefoot. Placing foot slightly high on platform emphasizes Gluteus Maximus. Placing foot slightly lower on platform emphasizes Quadriceps.