Assessment of low-to-moderate intensity physical activity thermogenesis in young adults using synchronized heart rate and accelerometry with branched-equation modeling

Hdl Handle:
http://hdl.handle.net/10149/58201
Title:
Assessment of low-to-moderate intensity physical activity thermogenesis in young adults using synchronized heart rate and accelerometry with branched-equation modeling
Authors:
Thompson, D. (Dylan); Batterham, A. M. (Alan); Bock, S. (Susan); Robson, C. (Claire); Stokes, K. (Keith)
Affiliation:
University of Bath. School for Health. Sport and Exercise Science Research Group.
Citation:
Thompson, D. et al. (2006) 'Assessment of low-to-moderate intensity physical activity thermogenesis in young adults using synchronized heart rate and accelerometry with branched-equation modeling', Journal of Nutrition, 136 (4), pp.1037-1042.
Publisher:
American Society for Nutrition
Journal:
Journal of Nutrition
Issue Date:
Apr-2006
URI:
http://hdl.handle.net/10149/58201
Additional Links:
http://jn.nutrition.org/cgi/content/abstract/136/4/1037
Abstract:
Low-to-moderate intensity physical activity thermogenesis is a highly variable and quantitatively important component of total energy expenditure that is difficult to assess outside the laboratory. Greater precision and accuracy in the measurement of this key contributor to energy balance is a research priority. We developed a laboratory-based protocol that simulated a range of low-to-moderate intensity physical activities. We characterized the bias and random (individual) error in estimating energy expenditure using combined accelerometry and heart rate (AHR) with branched-equation modeling and a simple motion sensor (pedometer) against an indirect calorimetry criterion. Twenty young adult subjects performed a 2-h laboratory-based protocol, simulating 6 low-to-moderate intensity physical activities interspersed with periods of rest. The physical activity level during the laboratory-based protocol reflected an energy expenditure toward the lower end of the active category. We found that AHR-derived energy expenditure showed no evidence of substantial fixed or proportional bias (mean bias 6%), whereas pedometer-derived energy expenditure showed both fixed and proportional bias (bias at minimum, mean, and maximum energy expenditure +11, –20, and –36%, respectively). It appears that AHR provides an accurate estimate of criterion energy expenditure whereas a simple motion sensor (pedometer) does not. It is noteworthy that AHR provides quantitative information about the nature and patterns of physical activity, such as the amount of time and/or energy spent engaged in physical activity above critical health-related thresholds.
Type:
Article
Keywords:
epidemiology; energy metabolism; exercise; physiology; heart rate; biological models; thermogenesis; young adults; accelerometry
ISSN:
0022-3166
Rights:
Author cannot archive post-print (ie final draft post-refereeing. For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 30/11/09].
Citation Count:
14 [Scopus, 30/11/2009]

Full metadata record

DC FieldValue Language
dc.contributor.authorThompson, D. (Dylan)-
dc.contributor.authorBatterham, A. M. (Alan)-
dc.contributor.authorBock, S. (Susan)-
dc.contributor.authorRobson, C. (Claire)-
dc.contributor.authorStokes, K. (Keith)-
dc.date.accessioned2009-04-01T10:45:48Z-
dc.date.available2009-04-01T10:45:48Z-
dc.date.issued2006-04-
dc.identifier.citationJournal of Nutrition; 136 (4): 1037-1042-
dc.identifier.issn0022-3166-
dc.identifier.urihttp://hdl.handle.net/10149/58201-
dc.description.abstractLow-to-moderate intensity physical activity thermogenesis is a highly variable and quantitatively important component of total energy expenditure that is difficult to assess outside the laboratory. Greater precision and accuracy in the measurement of this key contributor to energy balance is a research priority. We developed a laboratory-based protocol that simulated a range of low-to-moderate intensity physical activities. We characterized the bias and random (individual) error in estimating energy expenditure using combined accelerometry and heart rate (AHR) with branched-equation modeling and a simple motion sensor (pedometer) against an indirect calorimetry criterion. Twenty young adult subjects performed a 2-h laboratory-based protocol, simulating 6 low-to-moderate intensity physical activities interspersed with periods of rest. The physical activity level during the laboratory-based protocol reflected an energy expenditure toward the lower end of the active category. We found that AHR-derived energy expenditure showed no evidence of substantial fixed or proportional bias (mean bias 6%), whereas pedometer-derived energy expenditure showed both fixed and proportional bias (bias at minimum, mean, and maximum energy expenditure +11, –20, and –36%, respectively). It appears that AHR provides an accurate estimate of criterion energy expenditure whereas a simple motion sensor (pedometer) does not. It is noteworthy that AHR provides quantitative information about the nature and patterns of physical activity, such as the amount of time and/or energy spent engaged in physical activity above critical health-related thresholds.-
dc.publisherAmerican Society for Nutrition-
dc.relation.urlhttp://jn.nutrition.org/cgi/content/abstract/136/4/1037-
dc.rightsAuthor cannot archive post-print (ie final draft post-refereeing. For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 30/11/09].-
dc.subjectepidemiology-
dc.subjectenergy metabolism-
dc.subjectexercise-
dc.subjectphysiology-
dc.subjectheart rate-
dc.subjectbiological models-
dc.subjectthermogenesis-
dc.subjectyoung adults-
dc.subjectaccelerometry-
dc.titleAssessment of low-to-moderate intensity physical activity thermogenesis in young adults using synchronized heart rate and accelerometry with branched-equation modeling-
dc.typeArticle-
dc.contributor.departmentUniversity of Bath. School for Health. Sport and Exercise Science Research Group.-
dc.identifier.journalJournal of Nutrition-
ref.assessmentRAE 2008-
ref.citationcount14 [Scopus, 30/11/2009]-
or.citation.harvardThompson, D. et al. (2006) 'Assessment of low-to-moderate intensity physical activity thermogenesis in young adults using synchronized heart rate and accelerometry with branched-equation modeling', Journal of Nutrition, 136 (4), pp.1037-1042.-
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