EDKP 350 Lecture Notes - Lecture 8: Lean Body Mass, Hydrostatic Weighing, Bone Mineral
19 Dec 2012
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Document Summary
Relative body fat: used for classification of body fatness. Identifying those at risk of being under- or overweight. Assessing changes associated with aging, malnutrition, and certain diseases. Assessing effectiveness of nutrition and exercise interventions in counteracting changes identified above. 2 components (2c: categorizes body mass into. Ffbd: depending mainly on relative proportions of water and mineral. Varies w/ age, gender, ethnicity, level of bf, Pa level: negative %bf: comes from a higher than assumed body density, %bf of those with lower than assumed db will be overestimated using 2c model. Multicomponent model: account for mineral & water contribution, improved estimation of bf. Db estimation from ratio of body mass to body volume. Bv must be corrected for residual lung volume (rv) and gastrointestinal air (gv: error < 1% significantly increases if you don"t correct these. Measure displacement of water bv proportional but opposite to displacement of water. 2 model: fat free mass, fat mass.
