Are you sure? I've never heard of muscles burning. If your muscles become fatigued they recover and become even stronger (weight training).
What you said is kinda true. When you exercise muscles, they basically develop tiny tears and rips, and when they are rested well enough, they become stronger. But I don't think we're talking about the same thing. *sigh* Fine, fine, I'll find sources.
http://www.netwellness.org/question.cfm/28515.htmhttp://www.bodybuilding.com/fun/changingshape4.htm"The human body is designed to lose muscle mass in an event of starvation."
http://weight-loss.fitness.com/advanced-we...ation-mode.html"That's it. When the switch gets flipped on, this is called the starvation protection mechanism (SPM). This SPM has been literally designed through thousands of years of being a human race. In the past, food wasn't readily available and so your body had to preserve the most precious caloric tissue on the body, which for good or for bad, is fat. Your body is designed to store fat and burn muscle when it goes into starvation mode, which is the opposite if you want to stay slim and trim."
Read the 3rd paragraph:
http://www.ajcn.org/cgi/reprint/68/1/1.pdfIf you want to search more, type in "starvation lose muscle mass" or something like that in the search engine.