A trampoline is a device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs.

The steel can be made to fold up for transportation. The fabric that users bounce on is not elastic itself; the elasticity is provided by the springs that connect it to the frame, which store potential energy. Organized clubs and gyms usually have large safety end-decks with foam pads at each end, and spotters are placed alongside the trampoline to try to break the fall of any athlete who loses control and falls. People bounce on trampolines for recreational and competitive purposes. For different purposes, trampoline can differ at construction, size and shape.

A mini-trampoline (also known as a rebounder, trampette, jogging trampoline, or exercise trampoline) is a type of trampoline less than 1 meter (3 ft 3 in) in diameter and about 30 cm (12 in) off the ground, often kept indoors and used as part of a physical fitness regime. So-called rebounding provides a form of exercise with a low impact on knees and joints. Mini-trampolines do not give a rebound as high as larger recreational or competitive trampolines.

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