first nutrtion, 2011 Revised

first nutrtion, 2011 Revised - AMA Nutrition is, The...

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AMA – Nutrition is, “The science of food, the nutrients and substances therein, their interaction, action, and balance in relation to health and disease….” and the digestive and metabolic processes therein.
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“The rules keep changing” There are no good foods and bad foods. Advocates whole milk, eggs, salt, nuts, chocolate. In moderation
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1 calorie = Amount of energy required to raise temp of 1g of water by 1 ° C Relating to food and nuts, 1,000 cal = 1 Kilo calorie = 1 Calorie Energy needs: Basal metabolism = f(lean body mass) 60 – 70 % of basal requirement is from muscle. 25-40% from physical activity 10% “keeping warm”
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Calories count Intake > used: Gain weight Intake < used: Lose weight Intake = used: Maintain weight Easier to keep weight off than lose it, cumulative effect Body has “set point” Controlled by: Exercise Intake control – (see next) Behavior modification
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Calories and exercise- Dr. Montville’s cycling odyssey, NJ M.S. Ride Moving 175 lbs at 16.2 mph requires 700 calories per hour 80 miles at 16.2 mph = 5 hours Caloric expenditure = 3,500 calories Weight: Gain or lose?
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Ways to monitor “appropriate weight”: Height and weight tables Body mass index (BMI) BMI = Weight (kgs) /height in meters) 2 “Should” be 18-25 > 30 = obese; Over-estimates BMI in muscular people (athletes)
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“I’m not overweight, I’m under height.” Under height:
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first nutrtion, 2011 Revised - AMA Nutrition is, The...

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