Obesity - Obesity

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LR/CC/FNB Unit 3: Topic 9 Energy Balance
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LR/CC/FNB 1: Energy Expenditure : Basal metabolism L Vital body processes, respiration, circulation, resting muscle tone, body temperature. L Basal metabolic rate L Measured by oxygen consumption at rest L Approx. men 1 kcal/kg BW/hour L women 0.9 kcal per /kg BW/hour BW = body weight
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LR/CC/FNB 2: Changes in BMR : Body composition, L muscle has a higher BMR than adipose tissue L Gender, women have less muscle L Age, decrease in muscle L Exercise, will increase muscle bulk L Body surface area L Pregnancy, increased BMR L Thyroid hormone, disease. L Low-calorie intake reduces BMR
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LR/CC/FNB
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LR/CC/FNB
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LR/CC/FNB 3: Facultative Thermogenesis : Production of heat in response to changes in environment L Facultative (or optional) as opposed to (constitutive) or continuous L L * DT or dietary thermogenesis is sometimes called the Thermic Effect of Food or TEF L BAT is Brown Adipose Tissue
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LR/CC/FNB 4: Dietary Thermogenesis : Digestion of food requires energy L 5 to 10% of energy intake from the food L Muscular activity of gut L Energetic cost of secretions & degradation L Energy for active uptake L Transportation and storage in the body L L DT greater for large meals compared with same intake spread over a longer period
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LR/CC/FNB 5: BAT Thermogenesis : Brown adipose tissue L Heat generation, lots of mitochondria L Observed in mammals which hibernate L Heat regulation in infants
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LR/CC/FNB 6: Physical Activity : Not the largest energy use for most people L Depends on body weight, L Doubling body weight will double energy expenditure for a given physical activity L Energy used depends on the type, intensity and duration of the activity.
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LR/CC/FNB Activities Very light activity, sitting
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Obesity - Obesity

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