Swiss balls — also known as exercise balls, gym balls, sports balls, therapy balls or body balls — are used in physical therapy and exercise. They are elastic rubber balls with a diameter of usually 55 to 85 cm (22 to 34 inches).

Some free weight exercises can be performed while sitting or lying on a Swiss ball. This makes the exercises more difficult, which helps to exercise the deep torso muscles that are important for maintaining a good posture.

External links

• Swiss ball exercises (http://gymball.com/exercise.html)
• Spinal Stabilization: Exercise and Swiss Ball Concepts (http://pt.wayne.edu/WSUPT/course_pages/gs2002acontent/pps/patel.pps) (Powerpoint presentation)