Competitive trampolines are tall and rectangular shaped. The bed of a competitive trampoline is made from rectangular piece of webbing, a strong, non-elastic material. The elasticity of the trampolines comes from the springs. There are around 110 steel springs set around the bed, and together these act to push you further away from the bed the stronger you push against it. This amount of springs give so much force that trampolinists sometimes jump over 9m high!
The bed of the trampoline is usually 2m above the ground, and the trampoline is surrounded by matting over 25mm thick. Trampolinist rarely fall off the trampoline, as they can control their bounces and keep themselves bouncing in the centre of the trampoline bed. The centre of the bed is marked with a large 'X' so trampolinists can see whether they are moving from the centre. Moving backwards, forwards and from side-to-side is called 'travelling' and severe marks are deducted for this in competitions.
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