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Do muscles turn into fat when not used?

Human Anatomy, Physiology, and Medicine. Anything human!

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Do muscles turn into fat when not used?

Postby Swede » Mon Feb 22, 2010 10:42 pm

I have heard several of times that body builders, for example, replace their muscles with fat when they quit their training. This also goes for when it comes to other athletes: people who have been training a lot gain weight when they stop. One explanation is that this is because of that their eating habits continues, even when their training stops.

However - is there any other physiological mechanism that serves this phenomenon? I mean, do the muscle cells in muscle tissue get replaced by adipocytes through physiological means?
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Postby mith » Tue Feb 23, 2010 4:15 am

replaced or turn into? I'd find it hard to think muscles de-differentiate into adipocytes
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Re: Do muscles turn into fat when not used?

Postby Swede » Tue Feb 23, 2010 7:50 am

Replaced, I guess. I also find it hard to believe that myocytes would differentiate into adipocytes (even though differentiation of presumed terminally differentiated cells has been shown to happen).
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