Stand about a foot from a wall and face it. Step your right foot back 1 to 2 feet. Move your left foot forward so your toes and the ball of your foot are against the wall. Place your hands flat on the wall for balance, at about shoulder height. Bend your left knee, lunging forward slightly. Breathe deeply while holding for 10 seconds. Release and repeat with the other leg. Repeat once more on both sides.