Agreed, but I don't think this changes the conclusion much. Sure, it is very possible that the observed decrease in dementia risk alluded to in these articles i

Agreed, but I don't think this changes the conclusion much. Sure, it is very possible that the observed decrease in dementia risk alluded to in these articles is more linked to healthier lifestyles and habits, and the proven benefits of exercise, than being a direct 1:1 link. This really doesn't diminish the importance of exercise and healthier habits, though.