STARTING POSITION:
Position yourself on all fours on a mat. Your knees should be underneath the hips and hands under the shoulders. Retract your shoulder blade. Contract your pelvic floor and core.
MOVEMENT:
Extend the hip and move your right heel towards the roof. Make sure your knee is always at 90º. Return to the starting position in a smooth movement. Repeat the movement for the specified amount of repetitions, then switch sides and repeat with the other leg. Make sure that you move your leg and not your back.
TIPS: Focus on stiffen the spine all the time using your core muscles.