11:709:235 Lecture Notes - Lecture 27: Lean Body Mass, Hydrostatic Weighing, Densitometry
29 Jan 2019
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Document Summary
Essential fat levels- minimum level of body fatness, 150 lb reference male - 4% or 6 pounds, healthy range: 10-20, 124 lb reference female - 12% or 15 pounds, healthy range: 20-30% Why do women have higher body fat: essential fat is stored, hips, thighs, breast, nourish a healthy baby, reducing hip circumference can be a losing battle. Body composition measures: underwater weighing (densitometry, air displacement plethysmography (bodpod, dual x-ray absorptiometry, bioelectrical impedance anal, skinfold measurement. Body composition measures: air displacement plethysmography: measures body volume like uww, air, rather than water, is displaced, bod pod, accuracy similar to uww, smaller, lighter, more portable than uww, expensive, don"t eat, drink, exercise within 2 hours. Body composition measures: dual x-ray absorptiometry (dexa: like uww, also considered a standard, relies on x-ray technology, also measures bone mineral density, provides regional composition measures, technical and expensive.
