NTR_300_Energy_balance___weight_control

NTR_300_Energy_balance___weight_control - Fundamentals of...

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1 Fundamentals of Nutrition Energy Balance and Body Weight NTR-300 Dr. WH Turnbull Unless otherwise stated, all slides and information are derived from: Food Nutrition & Diet Therapy and Krause's Food & Nutrition Therapy, 11th 12th Edns ., 2004 & 2008. By Perspectives in Nutrition, 7th Ed., 2007. By Wardlaw & Hampl, Publ. Mc Graw Hill
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2 Objectives To have an understanding of the different classifications of obesity; its causes and disadvantages, hunger and satiety controls; weight reduction; and prevention of overweight and obesity. To have a basic understanding of behavioral modification techniques used to treat nutrition related disorders. To be able to cite the differences between anorexia and bulimia.
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3 Body Composition The body’s proportions of muscle, bone, fat, water, and other tissue that make up a person’s total body weight. Behaviors that achieve and maintain a healthy body weight take a lifelong of commitment.
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4 Latest data on obesity
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5 1998 Obesity Trends* Among U.S. Adults BRFSS,   1990, 1998, 2006 (*BMI  30, or about 30 lbs. overweight for 5’4” person) 2006 1990 No Data <10% 10%–14% 15%–19% 20%–24% 25%–29% ≥30% From: Centers for Diseases Control 2007
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6 Latest data on obesity
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7 Prevalence of Obesity in the USA Rates are steadily increasing especially in children. Caucasians are least likely to be overweight or obese. African Americans and Hispanics are most likely to be overweight or obese.
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8 Energy Balance Eat too little or too much = unbalanced energy budget (taken in more/less energy than you have spent). More food energy than needed = excess fat enters the fat cells in the body’s adipose tissue for storage. Any of the macronutrients available to the body in excess can be converted and stored as fat. Less food energy than needed = stored fat is withdrawn and used as a form of energy.
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9 Energy In = energy in foods and beverages, including alcohol. Become familiar with amounts of energy (calories) in foods and beverages. These are available from the following: Published tables and books Computer programs
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10 How to calculate the % energy from the different nutrients in the diet (refer to handout) Example Example A person consumes per day 60g protein 80g fat 310g CHO
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11 How many kcal from those nutrients Protein Protein 1g protein = 4kcal (16.8 kJ) 60g x 4 = 240kcal (1008 kJ) Fat Fat 1g fat = 9kcal (37.8 kJ) 80g x 9 = 720kcal (3024 kJ) CHO CHO 1g CHO = 4kca(16.8 kJ) 310g x 4 = 1240kcal (5208 kJ) Total energy Total energy = 2200kcal/d (9240 kJ/d)
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12 Calculate the % energy Protein Protein 240 ÷ 2200 x 100 = 10.9 % Fat Fat 720 ÷ 2200 x 100 = 32.7 % CHO CHO 1240 ÷ 2200 x 100 = 56.3 % Usually the % are rounded up to whole numbers.
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13 Energy value of food.
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14 Basal Metabolism Represents the minimum energy expended
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NTR_300_Energy_balance___weight_control - Fundamentals of...

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