In a non-twisting dive the diver must control the somersault rotation in order to make entry into the water at the correct angle. In a twisting dive both the somersault and twist must be controlled to give the correct amounts of rotation at entry. ln addition the angle of tilt away from the vertical somersault plane should be zero at entry into the water. As a consequence the diver has a much more complex control task during the aerial phase of a somersaulting movement when twist is present. This chapter will describe the ways in which twist can be initiated, controlled and stopped. Key Concepts 1. Twist may be initiated during takeoff (contact) or during the flight (aerial) phase. 2. Aerial twist is the result of tilting the body out of the vertical somersault plane. 3. Such tilt is produced during flight by movements which are left-right asymmetrical. 4. The twist will be fast when the tilt is large and the body is straight and tight. 5. Aerial twist may be stopped by removing the tilt. 6. The effects of contact twist may be present on entry.