You can use your keyboard to see the next slide ( ← previous, → next) How to do it:
Start in an elbow plank position
with palms down and abs braced in tight.
Slowly turn your toes, knees, and hips to the left as you reach your left arm up to the ceiling and stack your left foot on top of your right in a side plank on your elbow. Slowly lower back to your starting plank and then repeat to the right side.
Do as many reps as you can in a row without letting your hips sag for one minute, alternating sides each time.
Bonus burn: Moving from side to side during this plank set will not only challenge multiple muscle groups, but it helps elevate your heart rate too.
Do this quick circuit after cardio (or before the beach) for a swimsuit-ready stomach!