Muscles become sore from the lactic acid production being increased from strenuous output of energy on the muscles.
Stretching is a good way to help sore muscles to feel better.
Too much use of your muscles.
Your muscles tightening up
because your muscles are adapting to the workout you did
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Lactic acid settling in the muscles
Aching is a 6 letter word that describes sore muscles.
No
little
No
No, you muscles need time to restore itself.