The crunch is a classic ab exercise. It’s also pretty straightforward: Lie on your back with your knees bent and feet flat on the floor, contract your abdominals, and lift your shoulders, neck, and ...

Men's Health fitness director <a href="https://www.instagram.com/ebenezersamuel23/" id="482748e5-76f8-3b61-a9b2-a546d2a0b408"> Ebenezer Samuel, C.S.C.S. </a> knows ...