Application and development of indirect measures of free-living energy expenditure

 

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dc.contributor.advisor Lambert, Vicki en_ZA
dc.contributor.author Keytel, Lara en_ZA
dc.date.accessioned 2016-04-22T13:38:06Z
dc.date.available 2016-04-22T13:38:06Z
dc.date.issued 2004 en_ZA
dc.identifier.citation Keytel, L. 2004. Application and development of indirect measures of free-living energy expenditure. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/19142
dc.description.abstract The aims of this thesis were to explore the accuracy in measuring free-living total daily energy expenditure (TDEE), by examining existing indirect measures of energy expenditure (EE) measurement and further, developing new techniques, for improved accuracy and application, in population-based studies. In a number of the studies, the research focus is the heart rate (HR) monitoring technique, for TDEE estimation as a result of its low cost and ease of implementation in large population-based studies. This thesis represents a progression from the application of the HR monitoring technique for estimating EE in response to training, or as a means to validate a physical activity recall instrument. However, what is highlighted are the limitations of the existing methodology for estimated TDEE in this way. Therefore, this thesis introduces a novel concept in the HR monitoring technique, incorporating group-based EE equations, and further, by including the effects of the previous minutes HR response on the estimation of EE from HR. Finally, this thesis validates these modifications, using a respiration chamber, purpose-built as a part of this dissertation. It should be noted, however, that in some instances, the thesis was constrained by opportunistic sampling, or the fact that in the case of Chapter 4, the study sample was part of a larger study designed for another purpose. Nevertheless, the outcomes of this research, in particular, the group-based HR-EE prediction equations, have important implications for large population-based epidemiological research concerning physical activity dose-response. Bibliography: p. 227-253. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Human Biology en_ZA
dc.title Application and development of indirect measures of free-living energy expenditure en_ZA
dc.type Doctoral Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Health Sciences en_ZA
dc.publisher.department Department of Human Biology en_ZA
dc.type.qualificationlevel Doctoral
dc.type.qualificationname PhD en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Keytel, L. (2004). <i>Application and development of indirect measures of free-living energy expenditure</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology. Retrieved from http://hdl.handle.net/11427/19142 en_ZA
dc.identifier.chicagocitation Keytel, Lara. <i>"Application and development of indirect measures of free-living energy expenditure."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology, 2004. http://hdl.handle.net/11427/19142 en_ZA
dc.identifier.vancouvercitation Keytel L. Application and development of indirect measures of free-living energy expenditure. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology, 2004 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19142 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Keytel, Lara AB - The aims of this thesis were to explore the accuracy in measuring free-living total daily energy expenditure (TDEE), by examining existing indirect measures of energy expenditure (EE) measurement and further, developing new techniques, for improved accuracy and application, in population-based studies. In a number of the studies, the research focus is the heart rate (HR) monitoring technique, for TDEE estimation as a result of its low cost and ease of implementation in large population-based studies. This thesis represents a progression from the application of the HR monitoring technique for estimating EE in response to training, or as a means to validate a physical activity recall instrument. However, what is highlighted are the limitations of the existing methodology for estimated TDEE in this way. Therefore, this thesis introduces a novel concept in the HR monitoring technique, incorporating group-based EE equations, and further, by including the effects of the previous minutes HR response on the estimation of EE from HR. Finally, this thesis validates these modifications, using a respiration chamber, purpose-built as a part of this dissertation. It should be noted, however, that in some instances, the thesis was constrained by opportunistic sampling, or the fact that in the case of Chapter 4, the study sample was part of a larger study designed for another purpose. Nevertheless, the outcomes of this research, in particular, the group-based HR-EE prediction equations, have important implications for large population-based epidemiological research concerning physical activity dose-response. Bibliography: p. 227-253. DA - 2004 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2004 T1 - Application and development of indirect measures of free-living energy expenditure TI - Application and development of indirect measures of free-living energy expenditure UR - http://hdl.handle.net/11427/19142 ER - en_ZA


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