There are examples of endurance athletes that have had to have defibrillators implanted because of arrhythmias. I am unaware of any study that specifically looks at senior endurance athletes, or retired professional endurance athletes. To make sure I wasn’t doing any harm, and in anticipation of doing some VO2 work Kholie Moore style, I finagled a stress test out of my primary care provider. This was a nuclear stress test that looks at the heart perfusion before and after the exercise. I made sure to have the techs continue after their usual stopping point, which for me was a pulse of 135 (mid zone 2). I failed in the test because my legs gave out before I reached a pulse I’ve seen on the ramp test. My heart was completely normal on the scan. Other than testing like this, I don’t know how you would know you are OK to proceed. One thing to remember is that in the podcast, the emphasis was on the minimal effective dose of exercise to derive the benefits of heart health and longevity.
2 Likes