I think it's misleading to take this kind of studies like they have a binary conclusion (exercisers=smart, couch potatoes=dumb). I guess there are many factors

I think it's misleading to take this kind of studies like they have a binary conclusion (exercisers=smart, couch potatoes=dumb). I guess there are many factors affecting intelligence and fitness, from cultural to genetic. It might not be the only factor, but it could well be one of many.