Because of safety concerns associated with the metal frame and springs used to make
the traditional trampoline, some people have started to purchase trampoline accessories that can be used to protect both the jumpers and the condition of the trampoline itself. If the trampoline springs are allowed to get stretched, bent, or rusted, it can drastically reduce their elasticity. Stiff springs can mean serious injury, so it's a good idea to install a trampoline pad or to use a trampoline cover to protect them.