1
Sit on the end of a flat bench with your back against the backrest. Position your body so your thighs are supported by the bench and your feet hang off the edge. Maintain an upright posture with shoulders back and core engaged.
2
Place hands behind you on the bench for support, or hold onto the sides of the bench. Position your feet together or slightly apart. Your starting position should have knees bent at approximately 90 degrees with feet hanging freely.
3
Slowly lower your foot and lower leg by allowing your knee to bend, controlling the descent with quadriceps tension. The eccentric movement should be controlled and deliberate, taking 2-3 seconds as the foot moves toward the floor in an arc.
4
Contract your quadriceps to extend your knee, raising your foot back up to the starting position where your leg is nearly parallel to the floor. Pause briefly at the top, squeezing the quadriceps muscle, then repeat for the prescribed number of repetitions.