Hands In Air Dead Bug
Raising your arms off the floor adds an element of instability, making your core work even harder. Raise your arms straight up.Keeping your arms still, and your core tight, alternately lower each foot to the floor.
Benefits
This is a moderate-impact core-stabilizing exercise that can be helpful for strengthening the deep muscles of your abdomen and lower back. To get the best results from the movement, keep your core engaged throughout.