Side Jackknife

How to do it

1. Lie on your side with your legs straight and stacked. Rest your lower arm across your body and place your upper hand behind your head.

2. This will be your starting position.

3. Raise your top leg and your upper body toward each other at the same time, crunching your side. Your top elbow and top knee should travel toward one another.

4. Hold the squeeze for a count, then lower both back to the floor under control.

5. Complete your reps on one side before switching.