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
Air flow ball are roughly the size of a golf ball, but the harder they are hit, the more drag is created, so they are safe for golf training at home. Air flow ball Air flow balls are small, plastic balls, often used in physical training because of their many gaping holes, which help reduce backspin and increase friction, thus hampering the ability to travel long distances. Also, the light plastic shell cuts down on damage to other objects when the ball hits them, making them good for recreation in urban and suburban areas. Because they have very thin plastic shells, they break