In standing position, slightly bend your knees and widen your stance. Place your hands behind your head.
Hinge at the hips as if you're going into a squat position. Whilst keeping the chest up and back flat, kneel with one leg so you're in a half kneeling position. With the other leg, bring your knee down so you are fully kneeling. Lift one foot up and bring it in front of you. Do the same with the other foot and drive from the heels. Return to the starting position and repeat.