Comments of chapter undefined of Rebirth Of The Strongest Worldsmith

Isn't this kid 4/5 and has no background of exercise? How is he going to run the equivalent of 6.3 Miles in a day? Additionally the workout makes no sense for a person that young. It's just a copy paste of all the other similar novels that are an easy write off to give a kid a jump in power since you handed him advanced cognition for no reason.