STARTING POSITION:
Kneel on the floor and place a fitball on your right side. Extend your left knee towards your left side and support yourself on the fitball with your right elbow.
MOVEMENT:
Using your glutes lift your left leg as high as you can while you exhale. Make sure that your toes are always pointing forward. Return to the starting position in a smooth movement while you inhale. Repeat the movement for the specified amount of repetitions, then switch sides and repeat the exercise.
TIPS: Make sure you only move your legs when you perform the exercise.