Swing bowling is a technique used for bowling in the sport of cricket. Practitioners are known as swing bowlers. Swing bowling is generally classed as a subtype of fast bowling. The aim of swing bowling is to cause the ball to move in the air (or 'swing') whilst delivering mainly fast-paced balls to the batsman, in the hope that the change in the ball's flight path will deceive the batsman and cause them to play the ball incorrectly. Swing bowling is not to be confused with spin bowling, which involves bowling slow-pace balls which change direction primarily after making contact with the ground.