Surprise listeners, Chris Chavez here with a little quick episode of the CRS MAC

podcast. Just a brief chat that we had with Dr Michael Joyner of the Mayo Clinic

who back in 1991 published a paper that said it was physiologically possible for a human to run about a 158.

So with this sub-2-hour marathon attempt this weekend, we decided to give him a quick call.

Here is Dr. Michael Joyner. Oh, All right, and we're joined now by Dr Michael Joyner on a little bonus episode of the

Sidious Mac podcast Doc how's it going?

Couldn't be better, how are you?

Pretty good, pretty good.

So I'm guessing you've received quite a bit of attention recently, especially with this week's

big sub two hour marathon

a test that Nike is going to put on.

And so back in the day, you wrote something about the kind of like the limit

that the human body could push itself and I think the conclusion was something like a like a

158-157 marathon just take us through a couple years back how you came to to that sort of a conclusion and where we spend now?

Well Chris it's sort of a long narrative. I ran track and field at the University of

Arizona where I like to tell people I was good enough to get laughed by Alberto Salazar in the 10,000 meters of the then

PAC 10 championships. But as a result of that, I'd been a subject in some of the early studies

on the lactate threshold and got involved in human exercise

physiology research as a result of my interactions with Pete Farrell, a man named Eddie Coyote

Coil who's well known and also the late Jack Wilmore.

And so what happened is I was doing this during medical school in the 1980s, some ideas about

how maximum uptake, the lactate threshold in the running economy emerged to define performance.

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