Start standing with your feet shoulder-width distance apart. Bend your knees, lowering your hips as you come into a squat. Your thighs should be parallel with the floor (only go as low as your mobility allows and as low as you can while maintaining proper form), keeping your weight back in your heels.
With control, drive through your heels, as you begin to lift up out of the squat. Straighten your legs completely and lift your right leg out to the side. Be sure to engage your right glute muscle by squeezing it.
As you step the foot back into shoulder-width distance position, squat down again. Then stand up and do a side leg lift on the left side. Lower the leg back to the starting position.