Also known as the supine plank, the reverse plank is a bodyweight exercise that engages the core muscles alongside the lower back, glutes, and abdominal region. It involves assuming a position similar to the traditional plank but with the body facing upwards, towards the sky, supported by the hands and heels.

But despite the weird exterior, reverse planking is an excellent way to strengthen your entire body, improve your stability, and reduce your risk of injuries. As its name suggests, the idea behind a reverse plank is to extend your body into an isometric position. But, instead of facing the floor, you extend your arms back and face the ceiling.

For a quick refresher, a reverse plank is similar to a standard plank in that you support your body weight with only your hands and feet, says Gia Calhoun, a Pilates instructor and vice president of Pilates Anytime. “The difference is that you are facing up with your hands behind you rather than facing the floor,” she tells Bustle.

Inverted V Plank Instructions 1. Start in a low plank position with your body in a straight line, your elbows bent and under your shoulders and your feet hip-width apart. 2. Press down through your shoulders and arms to lift the hips toward the ceiling. 3. Slowly return to the starting position and repeat until the set is complete.