kevin goskowicz leads the study known as bemo, short for behavior modification. >> this is footage of teams in our study. they have this system in their helmets. >> reporter: researchers track, in realtime, the number and strength of hits to players' heads. shown in this video from the study, reveals who they say may be at risk for concussions. >> what's 95-g like in the context of a car? >> 25 miles an hour. >> reporter: coaches staged an intervention with jordan, focusing on drills to help him understand what's seen as a safer way to play. available online in a series of how-to videos. it's based on a method of tackling and blocking known as heads-up football, an nfl-funded and promoted program emphasizing players lead with their shoulders when tackling, not with their heads. a recent analysis found players between the age of 5 and 15 playing on teams adopting the program had a 76% reduction in injuries and a 29% reduction of concussions during games. jordan works on his form during specific drills at practice. and then reviews video of it from previous games. >> the impact that you