Stand with your back against a wall, placing your feet about two feet out in front of you. Feet should be hip distance apart.
Bending your knees, slide your back down the wall until your knees are at 90-degree angles. Your knee joints should be over your ankle joints, so you may need to inch your feet further from the wall to create proper alignment. Don't let your knees fall in on the midline of your body or sway outward.
Extend your left leg so it's parallel with the floor.