Exercise ball a chair because of ergonomic considerations or biomechanical reasons. This large plastic ball, known as a "birth ball", can also be used during labour to aid the descent of the fetal head into the pelvis. Sitting in an upright position will also aid fetal positioning and is more comfortable for the woman. Sitting on the ball with arms placed on a bed, table or otherwise sturdy object for support and gently rocking the hips may help the woman during contractions and aid the natural physiological process of birth. Exercise ball An exercise ball, also known as a Swiss Ball, is
Medicine ball whilst holding it. Some medicine balls are up to 14" wide and up to 14 lbs weight, or in the form of weighted basketballs. A med ball is used for children training as the best way to overcome fear of free weights exercises. Hippocrates is said to have stuffed animal skins for patients to toss for “medicinal” purposes. Similar large balls were used in Persia in 1705. The term "medicine ball" dates back to at least 1876, in "American Gymnasia and Academic Record", by Robert Jenkins Roberts, Jr. Medicine ball A medicine ball (also known as an exercise ball, a