1. 
   Trampolining
   Trampolining is a competitive Olympic sport in which gymnasts perform acrobatics while bouncing on a trampoline. These can include simple jumps in the pike, tuck or straddle position to more complex combinations of forward or backward somersaults and twists. There are three related competitive rebo...
   Found op http://en.wikipedia.org/wiki/Trampolining
   
   
2. 
   Trampolining
   Trampolining is an individual acrobatic sport consisting of various manoeuvres in the air performed with the aid of an apparatus called a trampoline.
   Found op http://www.probertencyclopaedia.com/browse/OT.HTM
   
   
3. 
   trampolining
   Gymnastics performed on a sprung canvas sheet which allows the performer to reach great heights before landing again. Marks are gained for carrying out difficult manoeuvres. Synchronized trampolining and tumbling are also popular forms of the sport. Used as a circus or show-business act in the early...
   Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0007117.html
   
   

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