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Some schools, such as Indiana and Virginia Tech, have used sensors inside players’ helmets to measure the impact of hits to a player’s head. Both the NFL and the NCAA have instituted stricter policies about allowing players to return from concussions, and both the NFL and NCAA have been named in concussion-related lawsuits.

The movement has even trickled down to youth football.

USA Football, an organization backed by the NFL, has introduced the Heads Up program _ an online educational program for parents, youth coaches and commissioners that teaches proper tackling techniques they hope will lead to fewer concussions. In March, USA Football, which is based in Indianapolis, plans to bring more than 20 current and former coaches to Indy to help train a group of “master trainers” that will help more than 100 youth leagues across the nation.

Some players at the Super Bowl said they had no problem letting their sons play football. Count former NFL offensive lineman Tony Boselli among that group. He responded to Obama’s comments on Twitter, by writing: “Interesting, I do have boys and I am thinking long & hard about them getting near politics. No problem them playing football.”