Gainer

A gainer is an acrobatic skill in which the acrobat performs a backwards somersault while still moving forward (used primarily to maintain momentum, while performing a move that requires a full body rotation). In diving, this is known as reverse rotation (as opposed to front, back, or inward). Many stunt performers and martial artists are capable of performing a similar skill on the ground, sometimes in combination with a midair inverted kick.

A half gainer involves the same motion, except the ending position is with the head downward. A half gainer can also be performed starting with walking on your hands and ending with your head upwards, although this is quite difficult.

In gymnastics, the maneuver is performed while standing on the side of a balance beam by kicking one foot forwards while flipping backwards.

A professional wrestling move called a shooting star press is very similar to a gainer, as it involves a wrestler performing a variation of a gainer from a standing position, onto an opponent (causing the wrestler to land chest first). This maneuver has many variations, ranging from different locations, different tuck styles / turns and also additional degrees of rotation, however the standard shooting star press is essentially a 3/4 gainer.