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Chapter10Energy Balance - Energy balance and Weight Control...

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Energy balance and Weight Control-
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Fat or Fit? Why? Fat and Flabby Houston Detroit Philadelphia New Orleans Columbus, Ohio Fit and Trim San Diego San Francisco Honolulu Boulder Minneapolis
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Hardees Monster Thickburger two 1/3-lb. patties  four strips of bacon  three slices of cheese  mayonnaise buttered, toasted,  sesame seed bun 1,420-calories 107 grams of fat
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Energy Balance Energy Intake = Energy Output
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Energy Balance: Energy Output Calories Basal metabolism Physical activity Thermic effect of food Thermogenesis
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Basal Metabolism ~60-70%  of total energy needs Minimum energy used to keep body alive   at rest but awake heartbeat, respiration, body temperature, varies between individuals
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Basal Metabolic Rate (BMR) Affected by: Body surface  area (weight, height) Gender (male>female) Body temperature ( fever ) Thyroid hormones Nervous  system activity Age (young>old) Calorie  intake Pregnancy Caffeine  &  tobacco
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Calculate your BMR Males – Weight (lbs) x 12   Females – Weight (lbs) x 11 Very simplified equation 134 lbs x 12 = 1608 calories
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Physical Activity Increases energy output beyond basal Varies among individuals More activity --> more energy burned
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Thermic Effect of Food (TEF) ~5-10%  of total energy consumed Energy to:   digest, absorb, metabolize food
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Thermogenesis Production of heat in response to: cold (shivering) Fidgeting maintenance of muscle tone posture overfeeding   Accounts for only  ~7%  of energy use
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Speed of Treadmill Desk? 1 MPH
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Total Caloric Output BMR Physical activity Thermic effect of food Thermogenesis
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Positive Energy Balance Energy  intake   >  energy  output Results in weight gain Needed for: Pregnancy Infancy Childhood
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Negative Energy Balance Energy  intake < Energy  output Results in weight loss
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How to Work Off Your Calories FOOD Calories Walk Cycle Swim Recline Apple 101 19 12 9 78 Apple Pie,1/6 377 73 46 34 290 Minutes of Activity
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Must control caloric intake
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Fig. 13.3 Model of Energy Balance Energy Intake Energy Output
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What is a healthy weight?
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