Jumping on a trampoline is a fun way to exercise, but without a high-quality spring connecting the mat to the trampoline's frame, you workout could end with a trip to the emergency room. Low-quality springs also decrease a trampoline's lifespan, especially if you don't have the knowledge or money to replace them.
Single Tier Springs
The word "tier" as applied to trampoline springs refers to the diameter of the springs loops. Single tier springs, which are often found on lower-end trampolines, are cylindrical in shape. This type of spring, though low in cost, is not recommended. Single tier springs tend to produce an uneven bounce, according to MiniTrampoline.org. This increases jarring and may also increase risk of injury.
Triple Tier Springs
Triple tier springs consist of three diameters of spring loop, with the widest loops at the center of the spring and the narrowest at both ends, creating a step appearance. This design helps absorb shock and creates an even bounce, according to MiniTrampoline.org. Higher-end rebounders and trampolines often use a triple-tier spring design.
Non-Spring Design
Not all trampolines and rebounders use springs. Some top-of-the line rebounders use high-quality elastic bands instead of springs. Elastic bands are quieter than squeaky springs, so you may consider an elastic band model if you live in close-quarters. Also, some manufacturers sell different elastic bands for different weights, allowing you to customize your trampoline to your needs.
Safety Considerations
Whatever spring you choose, be aware that even the highest-quality spring can cause problems. MayoClinic.com recommends ensuring that your trampoline has a shock-absorbing pad covering the entire spring so you won't land on the springs itself. The clinic also recommends putting your trampoline on a level surface and not attempting tricks.
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