Actually, I am interested in evidence of Multiple Impacts and Cumulative Sub-Concussive Impacts. CTE usually takes years to develop. The others start showing symptoms early. Two years of Kick Boxing, especially if it included kicks to the head during each round, can be the cause of quite an accumulation of impacts.

Any attempt to understand a health issue needs to start with a full and accurate history. The experts on concussion stress the importance of getting a full history of any impacts and involvement in contact sports.