if were adding too much muscle, we are adding to our daily cost of living The marathon runner is evolutionary more attractive, since during the primitive days you would need an efficient build to hunt for a long period of time. Bodybuilders would be seen as inefficient since they are heavier and may not need excessive muscle. This is aligned with my values for exercising since my priority is on health and cognition benefits with appearance second. I also do not want to be too big or else it would be expensive and tedious to maintain for my whole life.