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A member asked:

Why does the muscle become hard and sore after exercise?

A doctor has provided 1 answer
Dr. Alvin Lin answered

Exercise: Muscles tend to feel hard after exercise because they're filling up w/blood while attempting to flush out lactic acid, a metabolic byproduct of exercise. Build up of lactic acid leads to soreness.

Dr Willson agreed

Answered 4/7/2015

3k views

Thank

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