So, both aerobic exercise and weight training are important if you are trying to lose weight. Weight training helps you build muscle, and aerobic exercise will help you burn fat. When you are eliminating carbohydrates you are cutting three out of the five food groups, which is naturally going to cut down on the calorie intake. You also are dehydrating your cells, which is why you would see such rapid weight loss. Also, when you are restricting carbohydrates in your diet, that is your body's energy source, and your body instead uses lean muscle tissue.
Muscle weighs more than fat.
People will see a short-term effect of lowering cholesterol and weight loss but after four months it could rebound and you could have problems with cholesterol and weight gain because you have slowed down your metabolism. The Atkin's Diet does work, but people should understand that it causes them to become ketotic. When the body becomes ketotic, it produces metabolic by-products that are essentially poisonous to the body, including the brain. Thus, it's important to realize that these diets, which haven't been adequately studied, can likely cause some deterioration of brain function. As all diabetics know, it is important to avoid ketosis.