Lactic Acid Is Not Muscles' Foe, It's Fuel - New York Times

In the past, whenever I would hear lactic acid being discussed, the claims about what it was and how it worked seemed rather vague and the explanations seemed to be lacking or sometimes seemed somewhat magical. I never did understand what lactic acid really did or how it worked, and it is no wonder why. That's because people who said that lactic acid was a waste product that was bad for muscles apparently did not have a clear understanding of the scientific basis for their claims. And now, we find out that those widely disseminated ideas about lactic acid have turned out to be wrong. We are finally beginning to understand what lactic acid actually does in the body thanks to the work of scientists. Learn what they have found out in this article.