What move really works your body? KR: There's one where you get into a deep plié, rise up on the ball of one foot, then switch to the ball of the other foot and back. Eventually you rise up on the balls of both feet while staying in plié. You go down an inch, up an inch, down an inch, up an inch. Your legs are literally shaking. The burn is significant. But boy, it really sculpts my legs!