Body Fat Calculation and Health

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Body Fat Calculation and Health

Body Fat Calculation and HealthThe higher your percentage of fat above average levels, the higher your health risk for weight-related illness, like heart disease, high blood pressure, gallstones, type 2 diabetes, osteoarthritis, and certain cancers. Also, the higher your percentage of fat (and the smaller your percentage of muscle) the less calories you need to maintain your weight and therefore the easier it is to gain weight. This is because muscle is more metabolically active than fat tissue.

Body Fat Percentages and Lean Muscle Mass

When in ideal shape, body fat will make up about 15% - 18% of a male's body weight and 18% - 22% of a female's. The remainder of the body's "lean weight"is composed of water (55%-60%), muscle and other lean tissue (10%-20%), and bone and minerals (6%-8%). In other words, a 150-pound woman who is within or close to her ideal body fat composition range at 22% will have approximately 33 pounds of fat, 86 pounds of weight composed primarily of water, 20 pounds of muscle and other lean tissue, and 11 pounds of bone and mineral weight. This total then makes up her total weight of 150 lbs.

Now take the example of another woman who weights 150 pounds, but has 30% fat on her body. She would have 45 pounds of fat on her body, and the rest of her weight would be divided among muscle, bone and water. Her non fat body composition might look like this, 79 pounds of water (53%), 17 pounds of muscle (12%), and 9 pounds of bone and minerals (6%). Both women weight 150lbs. and are about the same height, but one looks much different because shehas less body fat.

Body fat percentage is generally accepted as a better gauge of weight lossprogress and fitness than scale weight. The method of calculating body fatfrom body measurements as used by HealthSmart Nutrition is the fourth mostaccurate method. Hydrostatic testing underwater is first. Electrical testingof body mass resistance is second and body fat measurement by caliper isthird. Although it is not the most accurate, if you record your measurementscarefully and consistently using the measurement taking instructions given,you will have a good relative gauge of how much body fat you are gaining orlosing. To our knowledge, the HealthKeeper software is the first program to offer this body fat percentage by measurement feature.

For higher accuracy you can override the automatic body fat measurement calculator and enter your body fat percentages done by hydrostatic testing underwater, electrostatic testing of body mass resistance or body fat percentage done by the caliper method. One product we highly recommend is the Tanita bathroom scale. It does very accurate electrostatic testing of body mass resistance to determine your body fat percentage in seconds.

more accurate of method you use for tracking your body fat percentage the more accurately you will be able to usethe Lean Body Weight tracker.

More about Lean Body Weight

The two most important graphs and statistics you want to watch to find out if you are making true and honest progress on your weight loss diet or body building program are, body fat percentage and lean body weight. Increasing lean body weight (mostly muscle mass) is important because if you body fat is going down into your ideal range and your lean body weight is going up you will be able to eat more calories without gaining weight and, it will be easier to maintain your desired body fat percentage when you reach your goal. This is because more lean body weight (composed of increased muscle mass) raises the body's basal metabolic rate

(BMR) and the calories your body burns even when you are doing nothing.

If you body fat is going down to your ideal range and your lean body weight is going up you should be absolutely ecstatic. You have attained two of the three holy grails of honest and lasting weight loss. (The third is keeping within your ideal body fat range for 3-5 years after getting there.)

In spite of lean body weight being such a vital statistic to honest weight loss,the Performance Diet is the only program and software we know that tracks it. (To track you lean body weight make sure you have used one of the 4 methods of body fat tracking and your body percentage is entered in your Personal Profile. Then go to the Graphing mode and select the correct date range and Lean Body Weight from among the various graphing options.)

The lean body weight tracking we use is based upon your current weight and the following formula. From your current weight calculate the number of pounds that is equal to your current ?X? percentage of fat. (That is the number of pounds of fat on your body.) The remaining percentage of your weight is your non-fat lean body weight. This is composed of muscle and other lean tissue, water, bone, blood and minerals. Over an extended period of time (even considering periodic water retention,) the levels of water, bone, blood and minerals remain fairly constant.

Benefits of Green Tea

Tea and Cancer PreventionTea drinking is an ancient tradition dating back 5,000 years in China and India. Long regarded in those cultures as an aid to good health, researchers now are studying tea for possible use in the prevention and treatment of a variety of cancers. Investigators are especially interested in the antioxidants-called catechins-found in tea. 1.

What are antioxidants?

The human body constantly produces unstable molecules called oxidants, also commonly referred to as free radicals. To become stable, oxidants steal electrons from other molecules and, in the process, damage cell proteins and genetic material. This damage may leave the cell vulnerable to cancer. Antioxidants are substances that allow the human body to scavenge and seize oxidants. Like other antioxidants, the catechins found in tea selectively inhibit specific enzyme activities that lead to cancer. They may also target and repair DNA aberrations caused by oxidants (1).

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2. What is the level of antioxidants found in tea?

All varieties of tea come from the leaves of a single evergreen plant, Camellia sinensis. All tea leaves are picked, rolled, dried, and heated. With the additional process of allowing the leaves to ferment and oxidize, black tea is produced. Possibly because it is less processed, green tea contains higher levels of antioxidants than black tea. Although tea is consumed in a variety of ways and varies in its chemical makeup, one study showed steeping either green or black tea for about five minutes released over 80 percent of its catechins. Instant iced tea, on the other hand, contains negligible amounts of catechins (1).

3. What are the laboratory findings?

In the laboratory, studies have shown tea catechins act as powerful inhibitors of cancer growth in several ways: They scavenge oxidants before cell injuries occur, reduce the incidence and size of chemically induced tumors, and inhibit the growth of tumor cells. In studies of liver, skin and stomach cancer, chemically induced tumors were shown to decrease in size in mice that were fed green and black tea (1, 2).

4. What are the results of human studies?

Although tea has long been identified as an antioxidant in the laboratory, study results involving humans have been contradictory. Some epidemiological studies comparing tea drinkers to non-tea drinkers support the claim that drinking tea prevents cancer; others do not. Dietary, environmental, and population differences may account for these inconsistencies. Two studies in China, where green tea is a mainstay of the diet, resulted in promising findings. One study involving over 18,000 men found tea drinkers were about half as likely to develop stomach or esophageal cancer as men who drank little tea, even after adjusting for smoking and other health and diet factors (3). A second study at the Beijing Dental Hospital found consuming 3 grams of tea a day, or about 2 cups, along with the application of a tea extract reduced the size and proliferation of leukoplakia, a precancerous oral plaque (1).

5. Is NCI evaluating tea?

National Cancer Institute (NCI) researchers are also investigating the therapeutic use of green tea. One recently completed but unpublished NCI trial studied the antitumor effect of green tea among prostate cancer patients. The 42 patients drank 6 grams of green tea, or about 4 cups, daily for four months. However, only one patient experienced a short-lived improvement, and nearly 70 percent of the group experienced unpleasant side effects such as nausea and diarrhea. The study concluded drinking green tea has limited antitumor benefit for prostate cancer patients (5).

Other ongoing NCI studies are testing green tea as a preventive agent against skin cancer. For example, one is investigating the protective effects of a pill form of green tea against sun-induced skin damage while another explores the topical application of green tea in shrinking precancerous skin changes.