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Lecture

March 15 disordered eating.doc

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Department
Nutrition
Course
NUTR100
Professor
Sabina Valentine
Semester
Winter

Description
March 15 – Ch 13 – Disordered Eating Learning Objectives 1. Explain what is meant by the statement that eating behaviours occur along a continuum 2. Compare and contrast disordered eating behaviours and true clinical eating disorders 3. Identify at least four factors that may contribute to the development of an eating disorder 4. Create a table listing the symptoms and health risks of anorexia nervosa, bulimia nervosa, binge-eating disorder, and chronic dieting 5. Discuss the steps you can use when discussing an eating disorder with a friend or family member 6. Explain the three components of the female athlete triad and explain how they are interconnected 7. Discuss ways of preventing the development of eating disorders and disordered eating Eating Disorders • Determining an eating disorder first requires a definition for “normal” eating • Peoples attitudes toward eating and body image occur on a continuum Eating disorders aren’t the same as disordered eating • Eating disorder: psychiatric condition involving extreme body dissatisfaction and long term eating patterns harming the body • Disordered eating: variety of abnormal or atypical eating behaviours used to reduce weight Multiple factors contribute to the development of an eating disorder: • Genetic and biological factors • Environmental factors • Family environment • Media images • Sociocultural values Genetic and Biological Factors • The probability of having an eating disorder is several times higher if a biological relative also has an eating disorder • This implies that there may be a genetic component; however, it is very difficult to separate genetic and environmental influences • Individuals with eating disorders may exhibit specific personality traits Environmental Factors • A genetic predisposition for an eating disorder may not be manifested until the environment triggers the behaviour • Environments experiences play a role in the development of an eating disorder in 20-40% of individuals diagnosed with the disease Family Environment • Our family influences what we eat and our patterns with regard to eatig • Familes with an anorexic member seem to have a more rigid family structure • Families in which a member has bulimia show a less stable family organization Media Images • Computer-enhanced images of “perfect” bodies fill the media • Adolescents aren’t always able to distinguish between reality and media fantasy • Comparing themselves to these images, adolescents may develop a negative body image Sociolcultural Values • Western culture values slenderness as beautiful and as a sign of self- discipline, health, and wealth • These cultural values influence a persons body image and can contribute to eating disorders Anorexia Nervosa • Anorexia nervosa: medical disorder in which unhealthful behaviours are used to maintain a body weight less then 85% of expected weight • 90-95% are young women • 0.5 – 4% of Canadian females will develop anorexia • 5-20% of females with anorexia will die from complications Symptoms of Anorexia Nervosa • Extremely restrictive eating practices • Self-starvation • Intense fear of weight gain • Amenorrhea: no menstrual periods for at least 3 months • Unhealthful body image Health Risks of Anorexia Nervosa • Electrolyte imbalance • Cardiovascular problems • Gastrointestinal problems • Bone problems leading to osteoporosis • Muscle and organ wasting • Infertility • Dry skin, hair loss, brittle nails Bulimia Nervosa • Bulimia nervosa: eating disorder characterized by binge eating followed by purging • Binge eating: eating a large amount of food in a short period of time • Purging: an attempt to rid the body of unwanted food by vomiting, laxative, fasting, exces
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