Why You (Probably) Can’t Exercise Too Much | Playbook, shoddy science oh my
This article is an example of really shoddy science writing. First the conclusion of the piece is based on the fact that Tour de a France riders appear to have a life expectancy 17% greater than others.
For all we know being at high altitude repeatedly caused the change. Or given what we know of Tour riders and doping you could equally claim that massive amphetamine usage can help you live 17% longer.
Do people who would otherwise live longer (ie healthy people) tend to join the Tour?
Do Tour riders stay active after their careers are over? A cyclist’s career typically isn’t long (the doping and crashes tend to catch up with you).
Without answering these questions the only real conclusion this article can draw is that Tour riders before 1942 tended to live longer than compatriots.
The study may in fact be solid but you’d never know it from Wired’s coverage. The conclusion in the study’s abstract is “Our major finding is that repeated very intense exercise prolongs life span in well trained practitioners”. Note the well trained tidbit there.