57, just back from 3 weeks in BC – Trans Rockies then 2 weeks MTB more in BC. Last year Trans Portugal etc etc Trans Alps etc etc. Endurance dosent decline as much as you age, no I’m not as fast as the younger ones. But hey I do enough to enjoy and take in the scenery 😉 and interestingly over the longer rides Im way faster than most of the younger ones. Of course rest is important, this weeks rest week maybe total six to seven hours only training.
People die, but its not because its too hard. I have the same lump as that guy in the photo. I also have a pace maker. If you need one I can assure you will know 😉 When I went in to the doctors, he just picked up the phone and rang for an ambulance. I was grey apparently 😀
As the doctor points out AF is caused by something else not being right that needs to be cured or controled. If you have AF and after the tests everything is ok they will fit a pace maker because its the electrical circuits that are damaged and not controling your heart. You can then return to your fitness (my simplistic view).
Of course if your like the guy in the article who admits he was burning the candle at both ends then clearly the stress, lack of sleep etc will have an effect over time. Clearly there is a balance to be struck.