Hacker News

Interesting study. It says, in a nutshell, that it can replicate previous findings that physical fitness in youth reduces the rate of premature mortality due to many conditions, like cardiovascular issues or cancer. That was expected.

Then it looks at the rate of premature mortality due to random accidents (I assume things like car crashes and being run over by trolleys) and finds the same reduced rate, but there should be no correlation.

So something non-causal is probably happening to reduce the stroke, heart attack, and cancer risk of people that were physically active as young adults.