ASTM F2970-22: Trampoline Courts
After watching trapeze acrobats perform tricks while bouncing off safety nets, American gymnast George Nissen invented trampolining in 1934. Nissen built the first protype trampoline…
ASTM F381-16: Consumer Trampolines
The kangaroo was the first animal to jump on a trampoline. To promote his invention, George Nissen jumped on a trampoline alongside a kangaroo in Central Park,…