Comment by hollerith

But tennis probably does not have amazing health benefits. You are criticizing comments here for perversely rejecting the amazing health benefits where I see them more as pointing out that it is irrational to conclude that just because there is a correlation between playing tennis at least twice a week and living longer that making yourself play tennis twice a week will cause you to live longer. Correlation does not imply causation.

What is true is that if you are the kind of person who can learn to play tennis well enough that it becomes fun, then you are likely to live a lot longer than if you are the kind of person who cannot do that because either your eyes, brain, your muscles or your cardiovascular system do not function well enough. For example, tennis sucks if your eyes and your brain does not work well enough for you to be able to learn to reliably hit a ball going very fast with the center of the racket, which a lot of people (and even a lot of people in the prime of their life) cannot ever learn to do.