What is walk-out plank on ball?

Walk-out plank on ball

1. Kneel in front of the ball and place your trunk over the ball. Use your legs to roll yourself forward until your hips are on top of the ball and your hands are on the floor.
2. Straighten your legs behind you so that you are balancing on the ball. This is the plank position.
3. Keep your body straight by tightening your belly and buttocks muscles. Keep your chin slightly tucked. Keep breathing and don't hold your breath.
4. Walk your hands forward, rolling as far forward as you can without losing your balance or letting your hips drop. You may stop with the ball under your thighs, or even under your knees or shins.
5. Hold for a few seconds. Then walk your hands back and return to the starting position, with your hips on top of the ball.
6. Repeat 8 to 12 times.