Adding some instability to your plank — via, for example, an exercise ball — increases the challenge for your core. Try holding this exercise ball plank variation, or level it up with an exercise called stir the pot.
- Start in an elbow plank with your forearms resting on the top of a ball.
- Don't let your hips droop or raise too high; keep your tailbone slightly tucked and core engaged, forming a straight line with your body. Be careful not to pull your elbows too close to your ribs; they should be directly below your shoulders.
- Hold this position for 15-60 seconds.
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