How to Do a Plank on Stability Ball

If you really want to challenge the core muscles, try this plank on a stability ball. Maintain the position as long as you can -- up to one minute -- for maximum muscle toning.

Step 1

Get into plank position by supporting your body weight with your chest and forearms on the ball and your toes on the floor.

Step 2

Lift your chest off of the ball so your upper body weight is supported by your forearms.

Step 3

Keep your abdominals contracted and your back straight, eyes ahead of you.

Step 4

Hold this position for as long as you can, building up to 1 minute.

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