Surely we are still evolving. Since civilization started, therefore we stopped running around or did less running, more than 100 if not perhaps 1000 if not even more generations have passed. During that time, we were evolving, thus adapting to the environment of a civilisation and moving away from the hunter gather running environment.

Rats do not have a civilisation. Humans do. Rats may need running, humans might not. For humans, demanding intellectual work may be better or just as good as running as far as cognition is concerned.