This is a great way to prepare your body for the forces of sports and everyday life! - Set up on a sturdy box - Step off the box (not up or down, just off!) to drop to the ground - As you land, absorb the force rapidly by dropping into "athletic position" - resembling a quarter squat - Make sure your knees are tracking in line with your toes before increasing the height of the box, and stop if your form degrades. Quality over quantity here is important!