Lecture 17- Measuring Body Composition

Lecture 17- Measuring Body Composition -...

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Lecture 17: Measuring Body Composition  23/05/2010 21:33:00 Indirect Calorimetry  Respiratory Analysis  Double labeled water o Non-Radioactive label o H2O o -Hydrogen is lost in H2O o Oxygen is lost in H2O and in CO2 o Lose the labeled O more rapidly than H o By subtraction: o Rate of Oxygen loss - Rate of Hydrogen lost H2O+CO2 -H2O =CO2 o If we had RQ can calculate expenditure! o Can estimate RQ from FQ (Food Quotient) Heart Rate Monitor  o –as indicator of energy expenditure  o Can measure over days o Problem Must acquire individual heart rate curves Curves change with physical conditioning Direct Calorimetry  Measure heat produced directly Very accurate Can’t measure for long periods of time Behaviors are restricted
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Very expensive A single weight measurement is poor indicator of energy content (body tissue) Body composition is not homogeneous
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This note was uploaded on 11/29/2010 for the course NS 1150 at Cornell University (Engineering School).

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Lecture 17- Measuring Body Composition -...

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