With your feet directly under your hips, start the move by stepping your right foot out wide to the side and coming into a lunge with your left fingers touching your right foot. Push your bum as far back as you can without toppling over to avoid your right knee going beyond your right toes. Keep your chest lifted and your weight in your heels.
To return to standing, push through your right foot, then lunge sideways to the left to complete one rep.