There are 3500 calories in one pound of fat. In order to lose 20 pounds of body fat in 10 days, her net calorie intake must be -7000 calories a day, not just -1500! So, to lose 20 pounds of fat in 10 days, She must burn 7000 more calories than she eats each day, an almost impossible task for anyone!

This means 80% of 20 pounds she actually lost in 10 days is NOT fat! Its muscle and water. With less muscle mass, body composition of a women has gotten worse and her body fat percentage has increased, even though she weighs less.

And I bet most of 20% real weight loss i.e. fat loss was due to Oprah's 10 miles walk so what was fad diet good for? And don't forget that she's going to gain back all muscle and water mass in some time (that has happened to her no less than 10 times now) through a complicated process due to which she'll gain a couple more pounds of excess fat than she had before going on diet! Read this article because they are flawed at grass root level! to learn a little about complicated process through which body recovers from effects of a fad diet. Courtesy: http://www.slimtour.com

Aerobic Exercise is a type of exercise that elevates heart rate and breathing for a continuous sustained period. This overloads heart and lungs and causes them to work harder than at rest.

There are many options to choose from today. Bicycling, aerobic dance, swimming, walking, and stepping are all examples of aerobic exercise. Which ones to chose depends on your physical condition, your history, your interests and your goals. Many experts believe it is better to alternate between 2 or more types, to get a better workout.

There are two main types of aerobics- high impact and low impact. It is better to alternate between high impact aerobics (which are harder on body and may cause more damage) and low impact aerobics, such as walking and swimming. This is called cross-training, and helps reduce chance or injury and overuse of certain muscles.

You will want to perform aerobic exercises at least 20 minutes a day for at least 3 to 4 days a week. If you are trying to lose body fat, or your physical condition is very good, then you may want to work longer at it. Try exercising up to 40 to 60 minutes 5 to 6 days a week.

Remember there is no real need to knock yourself out. Moderate intensity is almost always better and is more enjoyable. Low to moderate intensity is an especially good idea when starting out after a layoff or recovery from illness or injury, or if you are significantly overweight.

Warm-up and cool down is important to reduce discomfort and chance of injury. Warm up by starting slow and gradually build up to your top speed. Then slow down again at end of your workout.

The whole idea behind aerobic exercise is to get up and get moving! Find something you enjoy doing that keeps your heart rate elevated for a continuous time period and get moving to a healthier life.

By Dianne Ronnow © 2005 Mohave Publishing. All rights reserved.