So you were one of the best triathletes in the world, and I could still hang with you.

Welcome to the Primary Blueprint podcast, even though I wasn't racing.

From our studios in Malibu, California.

Not every day, but some days, because those are my hard days.

So Mark Sisson is back on podcast.

So nice to be here.

I'm Brad Kearns, the host, and it's been a while that we've

talked. It's been a long time. One of the things that's really a hot topic, that's still a hot

topic, amazingly, after your post back in 2007 about chronic cardio, it still seems to be an issue,

and there still seems to be one of the major stumbling box for people to try to balance

their health and pursue to fitness. So I thought we'd talk about chronic exercise today and just

get back to kind of a basic starting point about this topic. Yeah, it's interesting. That first

post I did was actually in 2005. It was a guest post on Art Devaney's site in which I sort of spilled my guts about how I felt about the years I'd, I won't say wasted, but the years I invested probably foolishly in the pursuit of this, you know, endurance effort that had led my life for so long. And I'd had my own set of

issues with, you know, all of the injuries and the advanced illnesses that I'd gotten, the chronic

infections and all the other stuff that we talk about. But, but almost more importantly,

when I put, when I put that first post together, I was looking at all of my

friends in the fields of endurance activities, whether it was marathoning or triathlon or cycling,

all these people that before the age of 40 had fallen apart. They'd either had heart attacks or

died or it had defibrillators installed or pacemakers or it had open heart

surgery and it was like the number was really mounting up and I thought there's something just

really bad about this it's not just coincidental that all these people are training so so hard

are having heart issues forget the joint issues because that was the other aspect

...