TBH a lot of sports are not actually "good" for you if you're doing them at a high level. It's one of the reasons so many athletes retire early and why so many are falling apart in their 30s. Many will have a great resting heart rate but their joints will be shot.
Yep. Take my better half. She played water polo for England when younger. By the time she was 30 her knees were totally shot from years of "egg beating".

, have always done that . I used to be able to do 200 press ups no problems, but then Im skinny so how intense or difficult was that really. Not a great achievement so I stopped bothering 