[multjoy]

It does not lead to heart damage and it won’t knacker your joints.

It will suck all the time you are doing it, but you physically cannot damage your heart from over exertion.

[cameldrv]

There's significant evidence that it can: https://press.rsna.org/timssnet/media/pressreleases/14_pr_ta...

If you don't think running can mess up your knees honestly all I can say is that obviously you don't know any serious runners.

[multjoy]

Lots of 'mays' and 'mights', and I've been running long enough, and know plenty of runners, to know that running ruining joints is a myth put about by the exercise avoiders.

[michaelcampbell]

Anecdata is not data.

[multjoy]

That's OK, because nobody's provided anything other than anecdote.