Pediatricians say cheerleading should be called a sport and subject to increased safety rules FILE - In this Sept. 9, 2011 file photo, a cheerleader from Nampa High School is thrown into the air as ...

Britt Hertz performs extreme cheerleading stunts with impressive skill.

But as its popularity thrives, cheerleading has evolved into feats of complex maneuvers, lofty basket tosses and human pyramids as tall as some small buildings. Safety regulations can limit the ...