. >> this is how professor dumer collects his detat with hits, he picks up the angle and acceleration of the head any time a player is hit. >> so the system is showing real-time impacts? >> basically within a couple of seconds of the impact it comes into the antenna and we can see live what happens to the

stefan, dumer head of virginia tech's biomedical department has been studying to answer the questionsuch. >> the mission is not to end football, but understand what is happening to make the game better. >> what have you learnt from the research? >> we can tell a college player, what exposure you have, if you are a quarterbacker, lion backer - we can tell you what the exposure is. >> that impact simulated 100 gs of slartion on the -- acceleration on the brain. that looks serious, because it is. >> that's the kind of force you may experience in a serious car crash. so right here on this diagram you can see the impacts that players are taking. >> this is how professor dumer collects his detat with hits, he picks up the angle and acceleration of the head any time a player is hit. >> so the system is showing real-time impacts? >> basically within a couple of seconds of the impact it comes into the antenna and we can see live what happens to the players. >> you can plot this out through a practice or on entire season. >> we were one of the first teams to limit exposure and practices. we had