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# Class Note for KIN 585 at UMass(11)

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This 2 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at University of Massachusetts taught by a professor in Fall. Since its upload, it has received 17 views.

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Date Created: 02/06/15
KIN 585 Energy Metabolism Barry Braun PhD Lecture 18 Questions 1 What are the 3 main components of energy expenditure and what is the energy used for 2 What is energy surplus Energy de cit energy balance 3 What are the major problems with selfreported methods of assessing energy intake and expenditure 4 How could you use oxygen consumption to estimate energy expenditure What major assumption do you have to make 5 The best way to measure energy expenditure is with doublylabeled water What are the MAJOR highlights ofthe technique and how do you convert what is actually measured carbon dioxide production into calories expended HINT see below The subject drinks a glass of water labeled with 780 and 2H The label mixes with body water and is lost from the body over the next 1421 days The key is knowing that the 2H label is lost only in water H20 excretion but the 180 label can be lost in both water and carbon dioxide C02 80 by knowing the difference between the 2 rates of excretion you know the total volume of C02 VCOz produced You can convert VCOz to volume of oxygen consumed V02 if you know the Respiratory Exchange Ratio RER which is the VCOz V02 The RER ranges from 70 total fat oxidation to 100 total KIN 585 Energy Metabolism Barry Braun PhD carbohydrate oxidation Why Because fat oxidation requires 23 02 and produces 16 C02 1623 070 Carbohydrate oxidation requires 6 Oz and produces 6 C02 so 66 10 If you assume a mixture of CH0 and Fat oxidation RER 085 then V02 VCOz085 Then you can convert V02 to kcals using the average value for a mixed diet 483 kcal periter of 02 consumed

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