Differences between 'marathon mice' and 'couch potato mice' reveal key to muscle fitness

Using "marathon" and "couch potato" mouse models, researchers have discovered that microRNAs link the defining characteristics of fit muscles: The abilities to burn fuel and switch between muscle fiber types. They also found that active people have higher levels of one microRNA than sedentary people.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/health_medicine/fitness/~3/Z7WCUOWQqxE/130508102648.htm

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