Running backs take hardest hits to the head, linemen take the most, U.S. college football study finds

Running backs take hardest hits to the head, linemen take the most, U.S. college football study finds: Researchers gathered data on the frequency, direction, and magnitude of head impacts from players who wore sensor-equipped helmets during three football seasons at Brown University, Dartmouth College, and Virginia Tech. The data amount to a measure of players' exposure to head impacts, which can ultimately help physicians and scientists understand how concussions occur.