Exercise ball Exercise ball An exercise ball, also known as a Swiss Ball, is a ball constructed of soft elastic with a diameter of approximately 35 to 85 centimeters (14 to 34 inches) and filled with air. The air pressure is changed by removing a valve stem and either filling with air or letting the ball deflate. It is most often used in physical therapy, athletic training and exercise. It can also be used for weight training. The ball, while often referred to as a Swiss ball, is also known by a number of different names, including balance ball, birth ball, body
Ball (dance party) Ball (dance party) A ball is a formal dance party. Social dance forms a large part of the evening; actual ballroom dancing may or may not occur. The word "ball" derives from the Latin word "ballare", meaning "to dance"; the Latin word also developed into French "baller"—from where it swapped into languages like English or German—, and "bailar", the Spanish and Portuguese verbs for "to dance" (although all three Romance languages also know "danser", "danzar" and "dançar" respectively). Catalan uses the same word, "ball", for the dance event. A well-documented ball occurred at Kingston Lacy, Dorset, England, on 19 December