Doctors are advising children to hop off their trampolines after declaring them a "health hazard".
The American Academy of Pediatrics (AAP) estimates that nearly 100,000 Americans are injured each year on trampolines and many of these are children.
Dr Michele LaBotz, who co-authored the AAP report said: "Families need to know that many injuries occur on the mat itself, and current data do not appear to demonstrate that netting or padding significantly decrease the risk of injury."
However, UK safety experts have countered by declaring the sport is "a healthy way to exercise and good fun" as long as sufficiently supervised.
Researchers found that most injuries occur when more than one person is left alone on a trampoline, while children under five are the most likely to suffer serious injury with 48% of injuries resulting in fractures and dislocations.
Rospa (the Royal Society for the Prevention of Accidents) have said that although more than half of all trampoling accident occur while children are being watched, trained supervisors can greatly reduce the risk.
A spokesman said: "Trampolining can be enjoyed safely if a few simple rules are followed, for example, put the trampoline on a softer surface like the lawn rather than concrete and consider using safety netting.
"But a safety net is not a substitute for adult supervision."
Latest UK figures show that, in 2002, 11,500 people in the UK ended up in hospital after a trampoline accident, more than double the number in 2007.
Posted 25/09/2012 by email@example.com