Football can look like a dangerous sport, but there could be serious risk on the sidelines too...if you're a cheerleader.
It's estimated that more than 208,000 cheerleaders were treated in emergency rooms during a recent 10 year period, according to the National Electronic Injury Surveillance System.
You've probably noticed their stunts have become really complicated in recent years, and researchers say all that fancy stuff may be to blame for a 110 percent increase in injury since 1990.
Their recommendation? Cheerleaders should be doing stunts on gym mats,with certified spotters.