HOW: Place a bosu ball in front of you on the ground with the blue side up. Step onto the middle of the ball and slightly bend your knee. Keep your other knee bent and off of the ball. Balance on the one leg and hold for the prescribed amount of time.
FEEL: You should feel the muscles in your lower leg working.
COMPENSATION: Keep your back straight up, don’t slouch forward. Make sure your foot is centered on the ball.