Hi Mike, yes, round trampolines are designed to send the jumper back into the middle. A smaller/lighter child will be more at risk as the jump from the heavier child can cause the smaller one to bounce towards them increasing the chances of a collision. As the report suggests, you should only allow one person on the trampoline at a time. No trampoline company should endorse more than one user on a round back yard trampoline. We too blogged about the same issue.

Best Regards
J.

My two cents...I would NEVER let more than one child on a trampoline at the same time UNLESS the trampoline is very large and they're both wearing helmets... Cracking skulls together is a good way to end up dead from head trauma, like Natasha Richardson or Billy Mays. Also, a side enclosed trampoline would be much safer overall than ones that are not, in my opinion.

Agree, our study of accidents also showed that most come from people damaging each other when bouncing together.

As J Says, the most common trampoline, the round garden one actually pushes the users back to the middle, whihc means its hard to stay apart. And its harder to control your own bounce when you can not control what the other is doing. and Rectangular Trampolines are generally too powerful to even think about more than one bouncer.

Certainly only one bouncer at a time, and then Daniel, helmets are unneccessary.

A proper safety net though is important, and mostly these days are almost universal. We recommend safety nets with the nets inside the poles.

Used properly, Trampolines are safe and fun, and very energetic.