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Unformatted text preview: (©Johner/Phototonica) C H A P T E R 7 C O N C E P T S More than half of the adults in the United States weigh more than is healthy. Keeping body weight healthy requires balancing calorie intake with calorie expenditure. The energy you obtain from food is used to keep you alive and moving and to process food. Energy consumed in excess of needs is stored as fat; this stored fat is used when you eat fewer calories than you burn. Genetics affect your propensity for storing excess body fat, but your food intake and activity level determine what you actually weigh. The goal of weight management is to reduce body fat to a healthy level and maintain that level throughout life. Weight loss requires reducing food intake and increasing activity; maintaining weight loss requires a permanent change in eating and exercise habits. Eating disorders are psychological disorders that involve abnormal eating behaviors in response to an excessive concern with body size and weight. Do overweight people eat more than thin people? Is obesity inherited? Can we stop the obesity epidemic? Can an eating disorder be life-threatening? J u s t A T a s t e The Washington Post Is Obesity a Disease? Insurance, Drug Access May Hinge on Answer By Rob Stein, Staff Writer Monday, Nov. 10, 2003—The rising number of Americans who are seriously overweight has triggered intense debate among scientists, advocacy groups, federal agencies, insurance companies and drug makers about whether obesity should be declared a “disease,” a move that could open up insurance coverage to millions who need treatment for weight problems and could speed the approval of new diet drugs. To read the entire article, go to www.washingtonpost.com. 187 7 Managing Your Weight We Are in the Midst of an Obesity Epidemic Excess Body Fat Increases Disease Risk A Change in Lifestyle Can Help Stem the Obesity Epidemic Body Fat: How Much and Where Determines the Risk There Are Many Techniques for Measuring Body Composition Body Mass Index (BMI) Can Determine If Your Weight Is in the Healthy Range Where Your Body Fat Is Located Affects Your Health Risks Your Genes Affect Your Body Size and Composition Obesity Genes Regulate Body Weight and Fatness Defective Obesity Genes May Promote Excess Fat Storage What You Weigh Is a Balance Between Your Genes and Your Lifestyle Balance What You Eat with What You Do We Get Energy from the Carbohydrate, Fat, and Protein in Our Food We Use Energy to Keep Us Alive and Moving and to Process Our Food Energy Can Be Added to or Removed from Body Stores EERs Estimate the Number of Calories You Need for Energy Balance Americans Are Eating More and Moving Less We Eat More Today than We Used To We Move Less than We Used To To Be Healthy, Americans Need to Eat Less and Move More Managing Your Weight Means Keeping It Healthy Assessing Your Health Risks Determines If You Should Lose Weight Weight Loss Involves Reducing Intake, Increasing Activity, and Changing Behavior Weight Gain Can Be Achieved by Increasing Intake...
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