This article is from the Diet FAQ, by Claudia McCreary cookignnewsletter@chef.net with numerous contributions by others.
Anaerobic exercise is activity which promotes the growth of muscle tissue,
as opposed to burning fat tissue, which is the point of aerobic exercise.
Anaerobic exercise involves pushing your muscles to the limits in order to
encourage them to grow to meet the demands that you put on them. Unlike
aerobic exercise, anaerobic exercise is short and intense. Weight lifting,
sit-ups, push-ups, chin-ups, and squats are all examples of anaerobic
exercises.
Anaerobic exercise does not cause weight loss; in fact, those who exercise
anaerobically on a regular basis may find themselves actually gaining some
weight due to the increase in muscle mass (even though their bodies are
becoming leaner and trimmer, since muscle is denser than fat). However,
anaerobic exercise is an important part in overall fitness precisely because
of that increase in muscle. Your muscles, after all, are what do the work
that burn calories, and the more muscle you have, the more calories you
burn.
 
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