101 ways to work out on the ball

 hese days, if you look around gyms, physical therapy clinics, and Pilates studios, you'll most likely see racks of stability balls in various sizes and shapes. Likewise, if you exercise at home, you've probably found the ball to be one of your favorite pieces of equipment. That's because the stability ball delivers profound results and is easy to use, while also offering a good challenge to both beginners and advanced exercisers.