Comment by 827a
1 day ago
Sure; I would enjoy talking about these confounding factors, on the tennis court after a round.
My point is that it seems like the only people who bring up trivia like "maybe tennis isn't as good for you as you think it is because there's survivors bias in the population of people used to do studies on the sport" are people who never play tennis. Similarly, if you're a runner you've probably multiple times had people say, directly to you, "oh I could never do that to my knees, running is so bad for them!"
You're explaining micro-gravity in orbit to an astronaut [1]. Leave the science and the confounding factor enumeration and the hypothesis to the academics. Just go play tennis.
> Similarly, if you're a runner you've probably multiple times had people say, directly to you, "oh I could never do that to my knees, running is so bad for them!"
Incidentally, yes if you have knees with tendency to hurt, you should not run much. That is not controversial, that is what doctors will tell you: running regularly can often cause pain in the knees from overuse. People who self identify as runners do run a lot. They are not doing 5km twice a week, they do something like 10km every day. And not everyone, especially not older people, can do that sort of load without damaging knees.
And those overuse injuries can make you stuck at home having to skip any kind of sport for very long time.