Shoulder taps

Muscles worked

You need

How to do it

1. Start in a push-up position with your hands under your shoulders and your feet about hip-width apart.
2. Lift one hand off the floor and tap the opposite shoulder, place it back down, then tap with the other hand.
3. The goal is a torso so still that a cup of coffee on your lower back wouldn't spill - all the movement belongs to the tapping arm, none of it to your hips.