The heel raise exercise involves standing with your toes either turned outward, straight forward or inward. Contract your calf muscles and slowly raise up on the balls of your feet, lifting your heels in the air. Maintain your balance as you reach the highest point you can raise on your toes and balls of your feet. Slowly lower your heels as you return to your starting position. Wait one to two seconds to regain your balance, if necessary, before repeating the exercise for 10 to 15 repetitions total.