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Why do our muscles feel intensely sore two days after a workout instead of immediately?

I did a heavy leg lifting routine on Monday and felt fine on Tuesday, but on Wednesday I could barely walk down the stairs. What causes this delayed pain?

fitness health science
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FitScience
asked 1mo ago · 10 rep

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This is called Delayed Onset Muscle Soreness (DOMS). It is caused by micro-tears created inside muscle fibers during eccentric loading, which triggers an inflammatory healing response that peaks 48 hours later.

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SportsPhysio answered 1mo ago

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