I laugh when I see people running for 6 miles are doing marathons or Iron Man’s. How can anyone think that is healthy and good for the long term functioning of the body? Study after study has shown that we are meant to be “lazy”. But no one wants to hear that. So listen to this guy, relax!
Numerous studies show that exercise provides U-shaped benefits to health [1], [2]. Specific to cardiovascular disease, repeat marathon runners [3] have higher calcium buildup than those who do not run in marathons, which as Robin might say, is one of those cases where the animal is driven too hard. While you have a point for extreme exertion, I'm not sure what you mean by "lazy". Current general recommendations are 1…
The linked study did not say anything about runners versus non-runners, so I would be careful in making such statement.
From the study: "We studied 100 male presumably healthy runners, aged 50-75 yr, who completed at least five marathons during the preceding 3 yr."
The study involved older marathon runners and found artery calcium plaque in some of them. It however did not include a comparable group of non-runners. It is entirely likely that the calcium plaque buildup happens in higher age regardless of lifestyle.
Or perhaps frequent marathon runners have less of it than non-runners. Or more of it. The point is that this study does not say what you claim it says.