"You get to take a picture covered in mud with your T-shirt and you look like you've gone through the war, " says Jim Thornton, president-elect of the National Athletic Trainers' Association.

WSJ: Office Workers Run Extreme Obstacle Courses

These guidelines have been endorsed by the following organizations: the NFL players association, (NFLPA) National Association of Athletic Trainers, (NATA) the American Football Coaches Association, the Neurocritical Care Society, the Child Neurology Society, the National Association of Emergency Medical Service Physicians, the National Association of School Psychologists, as well as the Child Neurology Society.

FORBES: Safety Prevails -- In Updated Guidelines To Manage Concussions