Adjust Smith Machine & safety clips then mount bar along shoulders. Place your front foot about 3 feet in front of box, and place the top of your rear foot on the top of the box. Keep knee behind toes at all times. Keep yourself upright as you slowly bend at the knee to lower yourself until rear knee lightly touches the floor. Push through your heel to return to the starting position. Repeat until all reps are performed, then switch legs.
Helpful tips and Tricks
The leg split length can be adjusted. The farther forward, the more glutes and hips are worked. The farther back, the more quads are worked.