lesson 7 - Recs for a Healthy Weight

lesson 7 - Recs for a Healthy Weight - LESSON 7...

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LESSON 7 Recommendations for a Healthy Weight INTRODUCTION In recent years much attention has been focused on the "obesity epidemic" in the United States. Although many in the population are dieting at any given point in time, the proportion of the population that is obese has continued to increase (see Figure 7-1). This chapter will examine problems associated with excess weight and discuss approaches for achieving healthy weights. First, what are some of the factors that contribute to calorie imbalance? Figure 7-1. Obesity Maps 1990, 1995, 2005
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LESSON OUTCOMES 1. Describe factors that contribute to the current "epidemic" of overweight and describe possible links between lifestyle, obesity, and chronic diseases. 2. Define terms associated with evaluating weight. Describe ways to evaluate body weight and fatness, and identify the most accurate methods. 3. Describe weight-related risk factors for chronic diseases and the strength of the associations. Identify appropriate responses to body-weight concerns including the National Heart, Lung, and Blood Institute (NHLBI) recommendations. 4. Describe pressures that encourage people to focus on weight loss. 5. Distinguish between healthy and unhealthy approaches to weight maintenance, weight loss, and weight gain, and the benefits and limitations of each approach. 6. Describe the symptoms, causes, and consequences of anorexia, bulimia, and disordered eating. KEY TERMS ± Overweight : weight that is greater than the "standard" for one's height. ± Obesity : extreme overweight. ± Adiposity : excess accumulation of fat cells. ± Metabolic fitness : normal blood pressure, glucose, insulin, and lipids. ± Natural, healthy weight : refers to the weight at which each individual has metabolic fitness and can participate comfortably in daily activities. ± Dual Energy X-Ray Absorptiometry (DEXA) : uses two low-dose X-rays to scan the body and distinguish among fat, lean tissue, and bone. ± Air displacement : measures body volume; a formula uses this information and the individual's weight to estimate body fatness. ± Underwater weighing : estimates body fatness by weighing the person both while completely submerged in water and above water, in conjunction with measuring the volume of water displaced. ± Bioelectrical impedance : estimates body composition by measuring resistance to a weak electrical impulse through the body. With more fat, resistance to the electrical current increases; inaccurate if the person is dehydrated or obese. ± Skinfold thickness : measures the layer of adipose tissue directly under the skin at several specific locations. ± Body Mass Index (BMI) : based on an individual's height and weight, either calculated from a formula or read from a table. BMI is not accurate for very short people or for the elderly, and it can misclassify muscular individuals such as athletes as obese. ± Waist measurement
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This note was uploaded on 10/17/2011 for the course HEALTH 100 taught by Professor Fugal during the Fall '09 term at BYU.

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lesson 7 - Recs for a Healthy Weight - LESSON 7...

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