PE%20142%20Course%20Notes%20Chapter%206

PE%20142%20Course%20Notes%20Chapter%206 - Faculty of...

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Faculty of Education School of Exercise Science, Physical and Health Education PE 142 Human Wellness and Potential Course Notes - Chapter 6 From: Hales, Dianne and Lauzon, Lara (2007). An Invitation to Health, First Canadian Edition. Toronto: Thomson Nelson. Chapter 6 Healthy Eating for Healthy Living About a billion people worldwide are now considered overweight or obese. In Canada more than six million people between the ages of 20 to 64 years are overweight. Another 2.8 million are obese. This represents 47 per cent of the Canadian adult population. Body Image In a study of high school girls, those who regularly read women’s health and fitness magazines, which may present unrealistic physical ideals, were more likely to go on low-calorie diets, take pills to suppress their appetites, use laxatives, or force themselves to vomit after eating. In other research, girls who watched a lot of television and expressed concern about slimness and popularity were more dissatisfied with their bodies than girls involved in sports. Boys’ body images also are influenced by media images depicting super strong, highly muscular males. What Should I Weigh? Many factors determine what you weigh: heredity, eating behaviour, food selection, and amount of daily exercise. For any individual of a given height, there is no single best weight, but a range of healthy weights. Health Canada has replaced ideal weight tables with a weight classification system that includes: Body Mass Index, Waist Circumference and Waist Hip Ratio. Body Mass Index BMI , a ratio between weight and height, is a mathematical formula that correlates with body fat. The BMI numbers apply to both men and women. You calculate your body mass index by dividing your weight in kilograms by your height in meters The formula is BMI = weight(kg)/height(m). Waist Circumference (WC)
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is used along with Body Mass Index as a practical indicator of risk that is associated with excess abdominal fat. A waist circumference above the cut off points is associated with increased risk of coronary heart disease, Type II diabetes and also hypertension. For men: WC>= 102 cm (40 inches) For women: WC>= 88 cm (35 inches) Waist Hip Ratio (WHR) To determine your Waist to Hip Ratio , divide your waist circumference divided by your hip circumference. A WHR greater than one for men or .85 for women is considered a signal of high risk for disease a WHR of .90 to one for men or .80 to .85 for women indicates moderately high risk a WHR less than .90 for men or less than .80 for women indicates lower risk. Body Composition Assessment Skinfold fat measurement. Hydrostatic (underwater) weighing Bioelectrical Impedance Analysis Dual-energy X-ray absorptiometry (DXA) How Many Calories Do I Need?
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