How to pull your belly in (abdominal hollowing)

You can do this exercise anywhere, in any position. Try it while you work at your desk, drive, or stand waiting for your turn at the store.

1. Pull in your belly and imagine pulling your belly button back toward your spine. (Remember to keep a neutral spine while you do this, and don't let your back bend forward. Neutral spine is the name for posture that maintains the three normal curves in your spine.)
2. Hold this for about 6 seconds. Remember to keep breathing normally. Then relax.
3. Repeat 8 to 12 times.