Stand facing away from low pulley. Place foot in cable boot attachment (as shown) or foot harness. Grasp lateral bars or other prop for support. Stand forward on free leg. Raise knee up positioning thigh approximately 45° forward. Allow lower leg attached to cable to be pulled back.
Keeping thigh stationary, extend lower leg forward until leg is straight. Return by lowering lower leg down and back to original position. Repeat.
Those with hamstring inflexibility may have difficulty fully extending knee if knee is too high. In which case, knee can be raised forward less than 45°. Pectineus, Adductor Longus, Adductor Brevis do not contribute to hip stabilization since they are only involved in initial range of hip flexion.