Exercise ball Exercise ball An exercise ball, also known as a Swiss Ball, is a ball constructed of soft elastic with a diameter of approximately 35 to 85 centimeters (14 to 34 inches) and filled with air. The air pressure is changed by removing a valve stem and either filling with air or letting the ball deflate. It is most often used in physical therapy, athletic training and exercise. It can also be used for weight training. The ball, while often referred to as a Swiss ball, is also known by a number of different names, including balance ball, birth ball, body
500 (ball game) must wait until the ball touches the ground before they pick it up in order to receive the 100 points at stake. If a catcher's score goes over 500, that person will revert to 0 and will become the thrower, and the thrower will in turn become a catcher. The game can be played using a frisbee instead of the ball. Kick Ball 300 is a variation where the ball is kicked as well as being thrown and caught. It was designed as a training exercise to promote cooperation in competitive games. 500 (ball game) 500 is a ball game