The backward takeoff is the technique used to gain lift and elevation prior to the execution of a backward or inward dive in either springboard or platform diving. It may involve a combination of an armswing and a leg press as in the case of a springboard takeoff, or just a leg press on platform.
Springboard Diving – In springboard diving the back takeoff (also known as a back press) involves the use of an armswing with a leg press, in timing with the vertical movement of the diving board to produce lift from the board. It can be as simple as one armswing beginning with the arms held over the head, to a coordinated movement using both the legs and arms to “rock” the board prior to the armswing and leg press.
Platform Diving – Platform diving requires no timing with the platform surface, thus the armswing is quicker and less involved than on springboard, with inward takeoffs generally eliminating the armswing altogether.