A day or two after an intense workout, your muscles are likely to feel pretty sore. There's all sorts of advice out there on how to ease that soreness: take a hot bath, do some light cardio, stretch it out. Whether or not they're good pieces of advice (we'll get to that!), most of them rely on the idea that your soreness is caused by a buildup of lactic acid, and that you need to flush it out to feel better. Well, sorry to disappoint: lactic acid isn't why you're sore. That fact is nothing new, either. Scientists have known that for decades.
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Written by Ashley Hamer September 8, 2017
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