When it comes to ab exercises, the Russian twist is a gut-busting staple. Add the instability of the BOSU and the move becomes even more challenging. But don't just take my word on it, try it yourself.
This move works the abs, especially the obliques, as well as the muscles that support the spine.
- Holding a four- or six-pound medicine ball at your chest, sit just forward of the center of the BOSU. Take your time to find the sweet spot for your balance.
- Bring your knees toward your chest, lifting your toes off the ground and twisting to the left.