eli5 Why/how do muscles shrink?

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You get sore muscles when you train, because you muscle strings rip and when they heal, your muscles grow. As far as I know. So why and how do they shrink?

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Anonymous 0 Comments

Other people have mentioned the muscles degrading. With that said, the most noticeable shrinking from someone who quit working out isn’t from a loss of muscle. The most noticeable shrinking is losing glucose storage in your muscles, resulting in less water storage in the muscles.

Also, if you are actively working out, your muscles are in a prepared state to lift heavier objects. Your muscle fibers are slightly firing in their preparedness state; this makes your muscles appear larger. After a short time of quitting exercise, they will shrink because they are no longer in that state.

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