Lie on your back with your feet on the ball, rolling your hips side to side to engage the core and improve flexibility.

For instance, exercises like lunges and side planks on the Bosu ball target your hips, hamstrings, and obliques, contributing to greater flexibility. Have a look at these straightforward yet ...

Want to work your abs with a yoga ball? We turned to an expert to walk you through the best moves to do—and how to do them.