Clamshell

How to do it

1. Lie on your side with your knees bent about 90 degrees and your heels in line with your spine.

2. Rest your head on your bottom arm and stack your hips so the top hip sits directly over the bottom one.

3. Keeping your heels together and your hips stacked, open your top knee toward the ceiling.

4. Stop before your hips roll backward. That roll is the whole exercise cheating itself. Lower under control.

5. Add a band above your knees once bodyweight feels easy.