Of course most aspects of life are stressful in some way. That doesn't seem to be a very interesting point. Sitting is probably bad for us, many of the foods we

Of course most aspects of life are stressful in some way. That doesn't seem to be a very interesting point. Sitting is probably bad for us, many of the foods we eat cause some damage, etc. What I meant was that popular knowledge seems to suggest that running is ultimately inappropriate in some fundamental way, and that humans try to avoid it. The trope is that running "hurts your knees" while studies suggest that running generally strengthens knee joints and obesity actually hurts one's knees.