Still not sure if you want to get an in-ground trampoline? Here are a few links to articles that discuss the idea.
Security World - "The main causes of injury and death include colliding with another person on the trampoline; landing improperly while jumping or doing stunts; falling or jumping off the trampoline; and falling on the springs or frame..."
Trampoline Safety Association - "Falling or jumping off a trampoline accounts for nearly 80 percent of hospitalizations needing surgery or overnight observation, but 35 to 50 percent of all emergency patients were treated and released. Scarily enough, five of six deaths since 1990 occurred as a result of fall-off accidents..."
C S Mott Childrens Hospital - "How can I make trampoline jumping safer? If your child already uses a trampoline, you should follow these safety measures. Location of the trampoline and safety features: Clear the area around the trampoline of objects and do not set the trampoline near trees, fences, poles, or other playground equipment. Set the trampoline where an energy-absorbing surface ... surrounds it. Buy and use a frame pad that covers the entire area of the spring system. If possible, lower the height to ground level by putting the trampoline in a pit..."
- Jumping on a trampoline may cause severe injury. Here are a few reaons why our patent pending in-ground trampoline system is safer than the above ground systems.
- Falling off a trampoline is the number one cause of injury on trampolines. Instead of falling 3 to 4 feet off of your trampoline, with our patent pending in-ground trampoline you literally step off on to your grass or other impact absorbing surface.
- We recommend a grass or soft woodchipped surface around the trampoline. Any impact absorbing surface will help to keep you safe in the event that you jump off of the trampoline.
- We also recommend that only one person be allowed to jump on the trampoline at a time. When two people are on the trampoline at once they can catapult each other or bump into each other. With two people on the trampoline the users cannot bounce in the middle of trhe trampoline where the safety margin is maximized.
- The area around the trampoline should be clear of all objects. Trampolines should not be placed near fences, trees etc.