Best ab workout

The Plank is pretty much the ultimate core move because it challenges all 360 degrees of your midsection, makes your shoulders burn, and even requires your glutes and quads to fire up, too. 😅 

How to:

1. Start kneeling at back of mat with toes tucked and butt resting on heels.
2. Walk hands forward to an all-fours position with knees under hips and wrists under shoulders.
3. Lean forward, then lift knees to form one straight line from heels to head. Keep hips high and abs engaged.
4. Hold for 15, 30, or 45 seconds, then relax.