Back press

1. Stand with your back 10 to 12 inches away from a wall.
2. Lean into the wall until your back is against it. Press your lower back against the wall by pulling in your stomach muscles.
3. Slowly slide down until your knees are slightly bent, pressing your lower back into the wall.
4. Hold for at least 6 seconds, then slide back up the wall.
5. Repeat 8 to 12 times.

Over time, work up to holding this position for as much as 1 minute.