Did you find that
What about professional athletes?
Mike Tyson, Kobe Bryant or David Beckham don't look younger than their ages.
No, they look just as old as they are.
So this exercise hype is partly just that, hype.
Exercise is really good for our body, health and longevity. I believe your observation is right. Professional athletes do exercise a lot, but their average life is not longer than normal people. Why?
When I was in the army, our trainers said that a drop of sweat during training would be worth a drop of blood in the real war. I don't know this kind of expression came from American camp or Korean camp. I am a Korean. This might be a metaphor, but it can be used in a real sense.
Do you see any person who tears a lot without a sad story and wipe out tears always? This person suffers with liver according to Traditional Chinese medicine. Do you see any person who sweats a lot during meals? Especially with spicy food? This means a suffering in heart yin. Sorry for difficult terminology.
Excessive exercise cause sweating. A little sweating may be good which means enough blood circulation in the body. In my opinion obesity person needs 10-15 minutes in more exercise after sweating to eliminate unnecessary by product accumulated in the body. I personally stop exercising less than 5 minutes of sweating. Any excessive is not good, either exercising or whatever it is. Moderate is the best. Excessive exercise means excessive sweating. Excessive sweating means lots of blood loss causing heart weakness.