physioball
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Physioball push ups — are an exercise which strengthen the triceps, chest, and the abdominal muscles. It is done by many athletes, particularly linemen in football.References* http://www.stackmag.com/TheIssue/ArticleDraw/3203 … Wikipedia
Exercise ball — An exercise ball, also known as a Swiss ball, is a ball constructed of elastic soft PVC with a diameter of around 35 to 85 cm (14 to 34 inches). It is used in physical therapy and exercise.The ball is also known by a number of different names,… … Wikipedia
exercise ball — noun A soft, elastic ball with a diameter of approximately 35 to 85 centimetres, used in physical therapy and exercise. Syn: physioball, Swiss ball … Wiktionary
