Exercise ball standard exercises, such as a push-up, on an unstable surface can be used to increase activation of core trunk stabilizers and in turn provide increased trunk strength and greater resistance to injury. Fitness Experts and some doctors also recommend sitting on an exercise ball instead of an office chair. That is based on the theory that the abdominal and back muscles are constantly engaged and active to maintain proper posture and balance on the ball. There is no scientific evidence of those benefits occurring by just sitting without additional exercises. However, some people warn against using a Swiss ball as
Trac Ball traditional Trac Ball. </div> Trac Ball "Not to be confused with the computer-input device called a trackball." Trac Ball (or Trac-Ball, or Tracball) is typically a game of catch played by two or more people wherein both participants wield an oversized glove/racquet/basket, passing a ball back and forth. The racquet is similar in appearance and function to a "jai alai" basket. Trac Ball is also utilized in a game called whirlyball. Whirlyball is a game played on bumper cars where two teams using track balls attempt to score goals against one another by throwing the Trac Ball into the opposing