dr. kevin goskowicz leads the study known as bemo, short for behavior modification. >> this is footage ofms in our study. they have this system in their helmets. >> reporter: researchers track, in realtime, the number and strength of hits to players' heads. that data, some of which is 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