Losing weight

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Calories and fat per serving	Fish in diet	Food guide pyramid	Healthy diet
Hunger center in brain	Muscle cells vs. fat cells	Weight loss	Yo-yo dieting

To successfully lose weight, you must carry out a plan to balance your caloric intake with exercise. Ideally, dieting should be done by eating a nutritionally balanced, low-calorie diet and increasing physical activity.

Weight loss - intentional; Dieting - fad diets; Fad diets

The terms overweight and obese describe excess body weight. Overweight typically refers to weight 10% above the expected body weight for height and build. Obese refers to being 20% over the target. The greater the excess, the more significant the health risk.

Your health care provider has charts and tables used to determine what your target weight should be, which varies according to gender, height, age, and bone structure.

A simpler and more useful piece of information is Body Mass Index (BMI). The BMI is calculated by dividing your weight (in kilograms) by the square of your height (in meters).

To figure out your weight in kilograms, multiply your weight in pounds by 0.45. To obtain your height in meters, first multiply your height in inches by 2.5, then divide that number by 100. Don't forget to square that result (multiply it by itself) when you use it in the equation.

To fall within the "healthy range" on the BMI, your result should be within 20 and 25. Results both lower and higher than these values are associated with significant health risks.

Another important piece of information is your percentage of body fat. This can be determined by a registered dietitian or an exercise physiologist. Using an instrument called a caliper, the thickness of a fold of skin is measured (for example, on the back of the arm) to estimate your total body fat.

The average adult woman of normal weight in the United States may have 20-30% body fat. Adult men in the United States average 10-20% body fat. Athletes usually have less, pregnant women usually have more.

WEIGHT LOSS

Although there are many programs advertised to help you lose weight, the only proven long-term and safe method is to burn more calories than you consume.