Weight_S10_Student - Weight Management Chapter 9 Prevalence...

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Unformatted text preview: Weight Management Chapter 9 Prevalence of overweight ~66% of adults are overweight Highest among women,blacks, and Hispanics, and the poor ~33% of children between 2-19 overweight or at risk for overweight Obesity trends Enzymes in fat metabolism lipoprotein lipase (LPL) promotes fat storage; produced by fat cells Women: fat cells in hips, thighs, and breasts produce LPL Men: fat cells in abdomen LPL activity increases after weight loss easy to regain weight Fat cell development Genetic causes of obesity Seems to affect susceptibility to obesity leptin ghrelin Leptin Acts as hormone Released when food in stomach suppresses appetite increases energy expenditure In mice, when given IV, reduces fat cell size AND number Leptin treatment Adiponectin Higher amounts in lean people than in obese Reduction in: inflammation insulin resistance Type 2 diabetes CVD Ghrelin Hormone Stimulates apetite & energy storage Levels high before meal; decline in proportion to kcal ingested High levels in underweight Decreased levels after gastric bypass Why?-doctors unsure Sleep and weight Link between short sleep duration and high BMI Lack of sleep: Increases ghrelin Decreases leptin Environmental causes of obesity: Overeating diet histories dont always reflect overeating In our society, high-fat, high-kcal foods: Readily available Heavily advertised Tasty Relatively inexpensive Ex: Grilled chicken sandwich or salad vs....
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This note was uploaded on 01/26/2012 for the course NTDT 200 taught by Professor Aljadir during the Fall '08 term at University of Delaware.

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Weight_S10_Student - Weight Management Chapter 9 Prevalence...

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