Heads in the game

Concussions and other injuries may create problems for football players in their retirement years, although some studies show good overall health for former champs.

If the coaches of the teams in the Super Bowl are like many football coaches, they'll exhort their players to "leave everything on the field" — or words to that effect. But the field undoubtedly leaves something with the players, too. National Football League athletes have likened their profession to experiencing a car crash every week. Researchers have started to investigate the consequences of these repeated, high-impact collisions, especially when they involve the head.

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