Glucose and Fat Oxidation: Bomb Calorimeter Be Damned

For both respiration and combustion, the energy loss difference between glucose and fat oxidation often is referenced to the efficiency of the fuel. Yet, the addition of anaerobic metabolism with ATP resynthesis to complete respiratory glucose oxidation further contributes to energy loss in the form...

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Main Author: Christopher B. Scott
Format: Article
Language:English
Published: Wiley 2012-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1100/2012/375041
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author Christopher B. Scott
author_facet Christopher B. Scott
author_sort Christopher B. Scott
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description For both respiration and combustion, the energy loss difference between glucose and fat oxidation often is referenced to the efficiency of the fuel. Yet, the addition of anaerobic metabolism with ATP resynthesis to complete respiratory glucose oxidation further contributes to energy loss in the form of entropy changes that are not measured or quantified by calorimetry; combustion and respiratory fat/lactate oxidation lack this anaerobic component. Indeed, the presence or absence of an anaerobic energy expenditure component needs to be applied to the estimation of energy costs in regard to glucose, lactate, and fuel oxidation, especially when the measurement of oxygen uptake alone may incorrectly define energy expenditure.
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spelling doaj-art-5cdb5c296eab44cdb872e00e2a272e7b2025-02-03T05:59:15ZengWileyThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/375041375041Glucose and Fat Oxidation: Bomb Calorimeter Be DamnedChristopher B. Scott0Department of Exercise, Health, and Sport Sciences, University of Southern Maine, 37 College Avenue, Gorham, ME 04038, USAFor both respiration and combustion, the energy loss difference between glucose and fat oxidation often is referenced to the efficiency of the fuel. Yet, the addition of anaerobic metabolism with ATP resynthesis to complete respiratory glucose oxidation further contributes to energy loss in the form of entropy changes that are not measured or quantified by calorimetry; combustion and respiratory fat/lactate oxidation lack this anaerobic component. Indeed, the presence or absence of an anaerobic energy expenditure component needs to be applied to the estimation of energy costs in regard to glucose, lactate, and fuel oxidation, especially when the measurement of oxygen uptake alone may incorrectly define energy expenditure.http://dx.doi.org/10.1100/2012/375041
spellingShingle Christopher B. Scott
Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
The Scientific World Journal
title Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
title_full Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
title_fullStr Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
title_full_unstemmed Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
title_short Glucose and Fat Oxidation: Bomb Calorimeter Be Damned
title_sort glucose and fat oxidation bomb calorimeter be damned
url http://dx.doi.org/10.1100/2012/375041
work_keys_str_mv AT christopherbscott glucoseandfatoxidationbombcalorimeterbedamned