The two to four inches of leg just below the back of your knee tends to be one of the most difficult areas to develop for women; but with consistant training beautifully shaped calves can be achieved. Jim Ryno's favorite move is the Stability Ball Calf Raise. Stand with your feet hip width apart lean your chest against the ball (which has been placed on a wall)... Your toes should be pointing forward.

Contract your calves by pushing off the balls of your feet to raise heels up in air (standing on toes.) Lower heels and repeat. Remember to keep knees slightly bent throughout movement to prevent any knee strain.

This exercise can also be done lying down on the ball with your feet shoulder width apart. With the stability ball under your chest, contract your calves so that you roll on the ball until it is almost under your stomach.