"After 90 hours of playing first-person shooter games..." 90 hours in the gym @ 3 hours / week = 7.5 months of exercise At this point one expect to see physic

"After 90 hours of playing first-person shooter games..." 90 hours in the gym @ 3 hours / week = 7.5 months of exercise At this point one expect to see physical changes in the mirror. Why would it be any different in the brain? A much broader implication may be that dedicating around 90 hours to something is the point at which your brain will start to show physical signs of adaptation.