Why exercise is necessary

I got this little gem and thought I should share it....

Most people involved in weight loss believe that it's all about the calories. If you burn calories more than you take in, you lose weight. If you take in more calories than you can burn, the body gains fat. While this piece of logic may make sense, it is only partly true. What burns calories nonstop is actually the lean muscle mass underneath body fat that allows more intake of calories without weight gain.

The body actually adapts to the changes it undergoes. Losing weight without exercising increases the risk of losing lean body mass, slowing the metabolism and putting the body into fat-storing mode. People who have lost body fat and muscle mass may notice that they don't have the muscle mass they once had. Worse yet, once they overeat even a little bit, they start filling up on body fat once again.

Source: http://www.naturalnews.com/035071_belly_fat_exercises_fitness.html