New Abs Exercises: Get a Six-Pack
9 Cutting-Edge Abs Exercises
Image: Beth Bischoff
Mountain Climber with Hands on Swiss Ball
Incorporating a stability ball increases the difficulty in this variation of mountain climber. To perform, place your hands on a Swiss ball, then alternate raising each knee, without allowing your back to round. Learn how to perform this move with perfect form.
Check out 5 ways to make classic exercises work better.