Kines 3502 Body Composition notes

Kines 3502 Body Composition notes - Body Composition Kin...

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1 Body Composition Kin 3502
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In general—the study of the components of the body and their relative proportions For HRPF—the relative proportion of fat and fat-free tissue in the body Body fat percentage ACSM 2010 2 What Is Body Composition?
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Health implications: Recognition of obesity and eating disorders Sarcopenia—age-related loss of muscle mass Functional implications: Sarcopenia is a major predictor of disability Obesity is a risk factor for CAD Body composition tests may encourage participants to increase their activity levels ACSM 2010 3 Why Study Body Composition?
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J –shaped curve Excess body fat: § Lowers aerobic fitness § Reduces movement efficiency § Increases health risk Underweight § Also undesirable § Decrease in performance 4 Weight and Morbidity/Mortality
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Complex relationship Compounded by numerous factors Lee, Blair, & Jackson (1999) § Aerobically fit men who were obese (25%+ body fat) did not differ from lean, unfit men in their risk for CVD Focus on weight can have negative consequences 5 Health and Body Fat
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Overweight: § Body mass index (BMI) > 25 kg.m-2 Obese § BMI  30 kg.m-2 Proportion of Americans who are overweight and obese is growing. 6 Definitions and Statistics (WHO: World Health Org.)
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7 From the CDC
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BRFSS, Behavioral Risk Factor Surveillance System http: //www.cdc.gov/brfss/ Mokdad AH, et al. The spread of the obesity epidemic in the United States, 1991—1998 JAMA 1999; 282:16:1519–22. Mokdad AH, et al. The continuing epidemics of obesity and diabetes in the United States. JAMA. 2001; 286:10:1519–22. Mokdad AH, et al. Prevalence of obesity, diabetes, and obesity- related health risk factors, 2001. JAMA 2003: 289:1: 76–9 8 Citations
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Source of the data: The data shown in these maps were collected through CDC’s Behavioral Risk Factor Surveillance System (BRFSS). Each year, state health departments use standard procedures to collect data through a series of telephone interviews with U.S. adults. Prevalence estimates generated for the maps may vary slightly from those generated for the states by BRFSS (http://aps.nccd.cdc.gov/brfss) as slightly different analytic methods are used. 9 US Adult Obesity 1985-2008
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1990 (among states participating in the BRFS System) § ten states with less than 10% obesity § no states with obesity equal to or greater than 15% 1999 § no state less than 10% obesity § 18 states with obesity between 20-24% § no state had prevalence equal to or greater than 25%. 2008 § only one state (Colorado) with obesity less than 20% § 32 states with greater than 25% 10 Obesity Trends across time
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1999 Obesity Trends* Among U.S. Adults BRFSS,   1990, 1999, 2008 (*BMI ‡ 30, or about 30 lbs. overweight for 5’4” person) 2008 1990 No Data <10% 10%–14% 15%–19% 20%–24% 25%–29% ≥30% 11
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12 Obesity Trends* Among U.S. Adults BRFSS, 1985 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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13 Obesity Trends* Among U.S. Adults BRFSS, 1986 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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14 Obesity Trends* Among U.S. Adults
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Kines 3502 Body Composition notes - Body Composition Kin...

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