Alt arm / leg raises

Muscles worked

You need

How to do it

1. Start in a push-up position with your hands under your shoulders and your body in a straight line from head to heels.
2. Brace your core, then raise one arm straight out in front of you while lifting the opposite leg behind you, until both are level with your torso.
3. Hold for a moment, return to the plank under control, then switch sides.
4. The goal is to keep your hips square to the floor the entire time - nothing moves except the working arm and leg.