STARTING POSITION:
Stand up straight on a step with your feet at shoulder width apart. The toes of your feet should be on the step with the heels extending off it. Bend your waist to let your partner sit on your hips. Contract your pelvic floor and core while keeping your chest up.
MOVEMENT:
Using your calves, raise your heels in a strong movement while you exhale. Return to the starting position in a smooth movement while you inhale.
TIPS: While your are doing the exercise, move only the ankle joints, make sure you don't move any other part of your body.