Plank
- HOW: Assume the plank position on your elbows and toes. Simply hold this position for the desired amount of time.
- FEEL: You should feel all the muscles in your stomach working to hold this position. You may also feel your shoulder and chest muscles working.
- COMPENSATION: Do not arch your low back, let your hips sag to the ground, or stick your hips too high in the air
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