FILE In this Sept. 22, 2013 file photo, fans scuffle in the stands during an NFL football game between the San Francisco 49ers and the Indianapolis Colts in San Francisco. A teenage football fan suffered a concussion and a broken arm and nose at Candlestick Park after police say he was attacked at the game this weekend.But that may change as they age and develop illnesses."In other words, the issue is an evolving one, and much, much more complicated than just maintaining the "right" BMI.And trying to disparage and dismiss findings that point to a more complicated message about weight and health due to a fear that the public might get confused and misinterpret the message is, well, unhelpful."One study may not necessarily tell you the truth, but a bulk of studies saying the same thing and being consistent, that really is reinforcing," Dr. Samel Klein, an obesity expert at Washington University in St. Louis, Mo., told Hughes.

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