An exercise ball is a round, air-filled object made of flexible elastic with a diameter of roughly 35 to 85 centimetres (14 to 34 inches). By removing a valve stem and inflating or deflating the ball, the air pressure can be altered. Physical treatment, athletic training, and exercise are where it is most frequently employed. It can be utilised for weight training as well. Even though it is frequently called a Swiss ball, the object is also referred to by a variety of other names, such as balance ball, birth ball, body ball, ball, fitness ball, gym ball, gymnastic ball, physioball, pilates ball, Pezzi ball, sports ball, stability ball, Swedish ball, therapy ball, or yoga ball.