The Air Force, and later the Space Agencies quickly employed trampolines with their pilots and astronauts. The trampoline also found Medical uses in helping the handicapped.
Every era produces at least one step forward in the sophistication of a trampoline machine used.
The most modern ones are capable of projecting an athlete to such a height that the top stars can touch 10m high ceilings and perform repetition triple somersaults with ease. It spread to Europe in the 1950s and display teams took it to all continents in the late 1950s and early 1960s, which is when many national federations were formed. 5 judges mark a routine for style. Style has 3 times the weighting of difficulty it used to have number of years ago, so the sport is very much more an aesthetic one, and safer too. There are competitions for individuals, teams of 5 and synchronized pairs.