What about something like headbanging, I think that type of vicious movement would constitute as sub-concussive impacts?

I often wonder how my high level soccer playing impacted my concussion recovery (never played since concussion). I played from the age of four until around seventeen, often seven days a week. I remember after some practices where we headed a lot; I would have brutal headaches. Often when people think of concussions they think of large events, like a car accident, but not small events such as heading a soccer ball that have a cumulative effect.

I also have many friends whom were avid soccer plays who have similar issues as I do. I wonder if some changes can be made to the game of soccer to prevent this?