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The original was posted on /r/todayilearned by /u/dustofoblivion123 on 2023-07-07 18:36:29+00:00.

Original Title: TIL the notion that lactic acid is the reason we experience muscle soreness after a workout has been debunked in the 1980s. Research suggests the soreness is a result of a cascade of physiological effects in response to microscopic trauma sustained during intense exercise.