Chapter 9 Textbook notes

Chapter 9 Textbook notes - Chapter 9 Textbook notes 2/3 of...

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Chapter 9 Textbook notes 2/3 of American adults are overweight - meaning their body weight is 10% over the recommended range and their BMI is between 25-29 1/3 of Americans are obese - BMI of 30 or more and body weight is 20% above recommended range Only about 2% of Americans are underweight- BMI below 18.5 or a body weight 10% below recommended range Several key principles are important to consider as you assess your own dietary, exercise, and weight management o No diet program, product, or service will magically make weight melt away. Successful weight loss takes time, effort, and motivation o Weight loss is far less important than your overall percentage of body fat…high body fat percentage is correlated with numerous health risks o Energy balance - relationship between the amount of calories consumed in food with the amount of calories expended through metabolism and physical activity o Negative caloric balance - amount of calories consumed in food falls short of the amount of calories expended through metabolism and physical activity Results in weight loss o Positive caloric balance - amount of calories consumed in food exceeds the amount of calories expended through metabolism and physical activity Results in weight gain o Isocaloric balance - amount of calories consumed in food in approximately the same as the amount of calories expended through metabolism and physical activity Able to maintain weight Weight management- lifelong balancing of calories consumed and calories expended through exercise and activity to control body fat and weight I. Why is obesity on the rise? A. “Globesity” is a worldwide trend Epidemic rates of obesity in the global population or “globesity” results from energy imbalance
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Diets high in processed fats, meats, sugars, and refined starches provide excess calories while labor-saving devices and sedentary lifestyles reduce energy expenditure There has been an upward shift in body fat percentages and weight in the last 3 decades Only the poorest countries of the sub-Saharan Africa do not reflect this world wide trend B. Energy imbalance is common in America 1. Overconsumption Americans consume 250-500 calories more per day than they did 30 years ago Without additional exercise, this imbalance in energy can lead to considerable yearly weight gain Many factors contribute to over-eating o Proportion distortion Food proportions in restaurants have grown steadily People don’t read their own “fullness signals” or feelings of satiety o Constant availability of food Easy access to food encourages overeating Many places have vending machines and packaged foods The more people have to chose from, they more they tend to eat o Advertising Product advertising contributes to overeating o Pricing The low prices of food in America is an environmental influence of overconsumption 2. Too Little Exercise There are hundreds of calories per day that we don’t burn off as we sit at our desks, drive
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This note was uploaded on 02/05/2011 for the course KIN 2504 taught by Professor Stone during the Spring '08 term at LSU.

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Chapter 9 Textbook notes - Chapter 9 Textbook notes 2/3 of...

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