I’m old enough that I competed the Western Roll on High Jump in Jr. High School. (Dive roll was already banned.)
Technique changed to the Fosbury Flop before I finished High School.
The evolution of technique.
In the Long Jump, Kiwi Tuariki Delamere competed a new technique at the Pacific 8 Track and Field Championships 1974. Front flip.
He was no gymnast. 😀
That jump was not far off the sea level World Record at the time.
Flipping was quickly banned.
Click PLAY or watch an interview with Tuariki on YouTube.
Others had tried that flip. I heard future Olympic gymnast, Sid Freudenstein, tried it High School competition for Triple Jump in 1968.
Related – How Tuariki Delamere’s somersault turned the sport of long jump on its head
Gymnastics Coaching.com 