Klaus: you mentioned that in your studies those with a history of concussion are more likely to get another one within a given time frame.

My question is, is the recovery time for subsequent concussions always going to be longer? Would the recovery time for the 3rd be longer than the 2nd which is longer than the 1st, etc?

I have heard of cases where the recovery for the first concussion was actually longer than the second. I also think it would depend on how it is managed as well (ie the second time around would better know how to "treat")