
Michael Lindinger
Professor and exercise physiologist specializing in equine and human nutrition; President of Nutraceutical Alliance; former Associate Professor at University of Guelph.
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Aug 7, 2026
Lactate as Fuel, Not Waste: The Physiology of Running Fatigue | Dr. Michael Lindinger
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10:13JoostHOST
So if you're looking for one-on-one personalized coaching, head over to pacebodies.com and book a 30-minute free consultation call with me.

Michael LindingerGUEST
Lactate is made in the cells of our, of our bodies whenever the demand for ATP from mitochondrial metabolism is not adequate.

Michael LindingerGUEST
So these are, for example, the rest to work transition for skeletal muscle when we increase the, or when we go from a lower work intensity to a higher work intensity.

Michael LindingerGUEST
So if you're running along and you're just cruising, and then you hit a hill and you don't wanna lose your position, you're gonna increase your work intensity.

Michael LindingerGUEST
So during that time, you will get an increase in lactate production, and you may also experience some burning and pain and discomfort as you approach the top of that slope.

Michael LindingerGUEST
So those are times when lactate is being produced in elevated concentrations, elevated amounts in muscle, and some of that lactate starts showing up in the blood.

Michael LindingerGUEST
So the other time that lactate is produced, and if we take it outside of an exercise situation, is in any situation where there is trauma or a decrease in an impairment of blood flow, and therefore oxygen delivery to cells, whether it's liver cells, brain cells, intestinal cells, what have you.
28 MINS LATER
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39:14JoostHOST
Is there some truth to it, like beta-alanine or other sodium bicarbonates, those act like buffers? Is there any studies as you, as you know, maybe?
Understanding Electrolytes
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Stephanie RuffHOST
But are there certain types of horses that are at more risk for an electrolyte depletion or imbalance? Yes.

Michael LindingerGUEST
Yeah, so horses that are in heavy work, they're sweating a lot, or they're being transported for more than an hour, they're training for more than an hour, they're in competition for more than an hour, those horses are at fairly high risk.

Michael LindingerGUEST
So horses doing an hour of moderate intensity work in a warm environment, talking 75, 80 degrees Fahrenheit, They will lose 15 to 20 liters of fluid through sweating in that one hour.
13 MINS LATER