By now, most of us have seen the “I don’t want to be photographed” video that has become ubiquitous on social media.

It’s easy to see the same sentiment among athletes.

But to help you stay cool and stay in shape, we’ve put together this guide to the “cool” core training, which we call the “stealth” core trainer.

To stay healthy, keep your muscles and joints strong and you can even go toe-to-toe with the elite.