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#workoutscience

3 clips from 2 authors · 4.6M total views. Every clip opens with its own counters and comments.

Ever wonder why you're so sore 2 days after leg day? It's not the musc — @flexplained1014.6M1:00@flexplained101Lactic acid is not the reason you can barely walk the next day. #Fitne — @flexplained10140.6K1:00@flexplained101Your lats attach from your hips to your arm. So when you arch your bac — @stefi.cohen3.9K1:03@stefi.cohen

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