What is push-up (legs on ball)?

Push-up (legs on ball)

1. Kneel in front of an exercise ball and lean forward over it. Place your hands on the floor in front of you.
2. Walk your hands forward until your legs are straight on the ball. This is the plank position.
3. When in plank position, hold your body straight by tightening your belly and buttocks muscles. Keep your chin slightly tucked. Keep breathing and don't hold your breath.
4. Holding the plank position, roll as far forward as you can without losing your balance. You may stop with the ball under your thighs, or even under your knees or shins.
5. Bend your elbows. Slowly lower your body toward the ground as far as you can without losing your balance. Keep your belly and buttocks muscles tight.
6. Slowly straighten your arms.
7. If your wrists hurt, try moving your hands a little farther apart so they're not right under your shoulders.
8. Repeat 8 to 12 times.