Start in a tabletop position, on your hands and knees on the floor. Make sure your wrists are underneath your shoulders and your knees are underneath your hips.
Extend the right leg behind you so your right toes are just tapping the floor.
Lift your straight right leg up to hip height. Avoid arching your back or tilting your hips, and keep your core engaged.
Lower your right toes to tap the floor. That's one rep.