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How to Do a Plank on an Exercise Ball
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Step 1 of 3
Put forearms on ball. Make a 90 degree angle (letter L) from shoulders to hands. Make a fist with both hands.
Step 2 of 3
Keep rest of body, from feet to head in straight line. Look forward. Tighten abs and core.
Step 3 of 3
Hold this position for designated amount of time.
You're Done
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