Knowledge Base

Physiology

Humans aren’t machines—we’re much more complicated. Exercise physiology involves changes in the body from exercise and rest.

From anaerobic threshold to environmental acclimatization, from FTP to PGC-1 alpha, we explore the science of human performance.

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Physiology > Biomarkers

lactate molecule lactic acid

The Lactic Acid Myth

There is no lactic acid in the human body. That said, the burn we feel during hard efforts has a lot to do with acid. We explain.

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Chris Case Fast Talk Podcast

Myth Busters—Why We Can’t Talk About Lactic Acid

Ouch, it burns! But what causes that burning sensation in our muscles when we work out? Dr. Inigo San Millan and Caley Fretz reveal new science on lactic acid and “the burn”.

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