Six Lies You Were Taught About Lactic Acid

Lie #5: Muscles Do Not Use Lactic Acid For Fuel

Some athletes are aware that lactate produced during exercise can be “recycled” into glucose and used as fuel by the muscles, heart, and brain. But few are aware that lactate is also metabolized aerobically in the mitochondria as a direct fuel for muscle contractions. In fact, it has been estimated that roughly 75 percent of the lactate produced inside the muscle cells is used in this way, and only 25 percent leaks out into the bloodstream, where it can be measured through blood lactate testing.

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