Buying a mini trampoline rebounder is a great idea, but before you buy, make sure you're getting a quality exercise trampoline. Many mini trampolines use weak steel springs, or bungee cords causing sinking and pronation of feet and knees. That can cause back problems. Using them in combination with home workouts, could cause serious injury. That's where the Cellerciser® home exercise trampoline comes into play. Take your fat burning workouts and strengthening exercises to a new level with this innovative product that is designed with triple-tiered™ carbon steel annondized springs and all-steel construction to ensure a safe, durable exercise rebounder.