Stand up straight with a Bosu ball positioned on its flat edge behind you about 1 step's length away.
Standing on the leg to be exercised, place your other foot behind you on the Bosu ball.
Keeping your back straight and your gaze directly ahead, bend your stance leg into a squat.
Ensure your knee travels directly forward over your toes.
Control the movement as you straighten back up again, and repeat.
