1. Get into a face down position on the floor supporting your upper body on your forearms. Your elbows should be bent at 90 degrees.
  2. Extend your legs straight out behind you, supporting them on your toes and balls of your feet.
  3. Keep your body in a straight line by tightening your abdominal and oblique muscles.
  4. Hold for as long as possible.

Note: For extra balance training and core strengthening, you can lift one arm or leg.