Used as a training tool for gymnasts, divers, pole vaulters and as its own sport, the trampoline improves stamina, strength and coordination, and provides cardiovascular exercise. While specific features vary, trampolines essentially consist of an elevated buoyant surface supported by springs, surrounded by a frame. They also often include various safety features such as pads and nets.
Jumping Mat
Jumping mats, the flat surface on which you bounce, were initially made from heavy canvas material. As the sport has evolved, the composition of the mat has changed. More modern trampolines typically consist of tightly woven fibers made from polyethylene or nylon. The resulting mats are often UV-protected to prevent fading when used outdoors.
Springs
Springs hold the trampoline mat taut and provide the only source of bounce. For circular trampolines, coil springs have wire ends formed into hooks attaching the edge of the trampoline mat to the frame. The specific tension in the spring depends on the trampoline manufacturer. High-tension springs allow less bounce but more force per bounce than low-tension springs.
Frame
Frames hold the trampoline off the ground and provide structural support. Frames, or tubing, typically consists of 13-gauge galvanized steel, often 3 inches in diameter. Galvanized steel protects the frame from rust and other environmental conditions. Frames come in many shapes and sizes. Competitive sports use a 6-by-12-foot jumping mat with a 9-by-15-foot frame, while the Olympics use a 7-by-14 mat attached to a 10-by-17 frame.
Safety Features
Both the springs and frame contain several safety features. Vinyl-covered foam pads attach to the springs with pie-straps. These pads also surround the steel frame. Home trampolines come with safety nets encircling the jumping mat area to help prevent injuries from falls.
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