The Cincinnati Children's Hospital Medical Center announced Monday more findings from its concussion study that looked at head-injury data based on the altitude of all 30 NFL metropolitan markets.
The study, which looked at regular-season data from 2012 and 2013, included research that found:
The study found the risks for concussions were significantly less during NFL games in Phoenix, Atlanta, Buffalo, Charlotte, Denver, Indianapolis, Kansas City, Minneapolis and Pittsburgh. Those cities have an elevation ranging from 644 feet to 5,192 feet. The odds of sustaining a concussion in those cities were 30 percent lower.
The basis of Myer's research is the belief that concussions come from "brain slosh" and how tightly the brain fits inside the human skull. At higher elevations, the human brain swells and fits more tightly inside the skull. He said woodpeckers and big horn sheep do not get concussions because their brains have developed to fit tightly inside their skulls.
The study was consistent with a concussion study by the Cincinnati Children's Hospital in November that found head injuries decreased by 28 percent at elevations higher than 644 feet.
-- Bill Bradley, contributing editor