Discussion #25

Discussion #25 - o Increased disease risk associated with...

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Kin 110—Discussion #25 Monday April 12 th , 2010 Body Composition 2 basic types of tissue: o Fat mass o Fat free mass (lean tissue) In healthy individuals typical body composition o Lean tissue/muscle: 35-40% o Fat mass: 20-25% o Rest made up of water, bone, connective tissue etc. Dual Energy X-ray Absorptiometry o Accurately determines lean mass, fat, and bone o Gold standard but… Exposure to radiation Expensive 2 inexpensive and simple ways to estimate body fat o 1. Waist circumference Measured by wrapping an elastic tape measure around the waist line about 1 inch above the navel and recording length Higher waist circumference associated with amount of fat stored around organs (visceral fat) o 2. Body Mass Index (BMI) Highly correlated with TOTAL body fat BMI (kg/m 2 )=weight (kg/height )(m 2 ) Remember: 1 kg =2.2 lbs and 1 inch =0.0254m Key limitation: BMI does not take into account the amount of each tissue type Higher the lean mass content may lead to higher BMI value
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Unformatted text preview: o Increased disease risk associated with greater levels of overweight and obesity Ideal Weight and Percent Body Fat Varies Across Individuals • Ideal weight and percent body fat varies across individuals • Average adult percent body fat: o Men: 15-18% o Women: 22-25%- Minimum percent of body fat considered safe for food health: Men: 5% Women: 12% • How low is too low? o The female athlete triad is ONE situation that highlights the problem with very low body fat o Characterized by three things Low energy availability/eating disorders Amenorrhea and menstrual disorders Decreased bone mass and increased risk of stress fractures and osteoporosis • Consequences of the Female Athlete Triad o Decreased exercise performance o Increased risk of fracture o Loss of reproduction function o Nutrient deficiencies and fluid/electrolyte imbalance...
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This note was uploaded on 10/19/2011 for the course KIN 110 taught by Professor Lass during the Spring '08 term at UMass (Amherst).

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Discussion #25 - o Increased disease risk associated with...

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