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Utility of the Actiheart Accelerometer for Estimating Exercise Energy Expenditure in Female Adolescent Runners

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dc.contributor.author Nichols, Jeanne F. spa
dc.contributor.author Aralis, Hilary spa
dc.contributor.author García Merino, Sonia spa
dc.contributor.author Barrack, Michelle T. spa
dc.contributor.author Stalker-Fader, Lindsay spa
dc.contributor.author Rauh, Mitchell J. spa
dc.date.accessioned 2013-11-27T17:26:40Z
dc.date.available 2013-11-27T17:26:40Z
dc.date.issued 2010 spa
dc.identifier.citation Nichols, J. F., Aralis, H., García-Merino, S., Barrack, M. T., Stalker-Fader, L., & Rauh, M. J. (2010). Utility of the actiheart accelerometer for estimating exercise energy expenditure in female adolescent runners. International Journal of Sport Nutrition and Exercise Metabolism, 20(6), 487‐495. spa
dc.identifier.issn 1526484X spa
dc.identifier.uri http://hdl.handle.net/11268/936
dc.description.abstract There is a growing need to accurately assess exercise energy expenditure (EEE) in athletic populations that may be at risk for health disorders because of an imbalance between energy intake and energy expenditure. The Actiheart combines heart rate and uniaxial accelerometry to estimate energy expenditure above rest. The authors' purpose was to determine the utility of the Actiheart for predicting EEE in female adolescent runners (N = 39, age 15.7 +/- 1.1 yr). EEE was measured by indirect calorimetry and predicted by the Actiheart during three 8-min stages of treadmill running at individualized velocities corresponding to each runner's training, including recovery, tempo, and 5-km-race pace. Repeated-measures ANOVA with Bonferroni post hoc comparisons across the 3 running stages indicated that the Actiheart was sensitive to changes in intensity (p < .01), but accelerometer output tended to plateau at race pace. Pairwise comparisons of the mean difference between Actiheart- and criterion-measured EEE yielded values of 0.0436, 0.0539, and 0.0753 kcal . kg(-1) min(-1) during recovery, tempo, and race pace, respectively (p < .0001). Bland Altman plots indicated that the Actiheart consistently underestimated EEE except in 1 runner's recovery bout. A linear mixed-model regression analysis with height as a covariate provided an improved EEE prediction model, with the overall standard error of the estimate for the 3 speeds reduced to 0.0101 kcal . kg(-1) . min(-1). Using the manufacturer's equation that combines heart rate and uniaxial motion, the Actiheart may have limited use in accurately assessing EEE, and therefore energy availability, in young, female competitive runners. spa
dc.language.iso eng spa
dc.title Utility of the Actiheart Accelerometer for Estimating Exercise Energy Expenditure in Female Adolescent Runners spa
dc.type article spa
dc.description.impact 2.230 JCR (2010) Q2, 33/70 Nutrition & dietetics, 20/80 Sport science spa
dc.rights.accessRights openAccess en
dc.subject.unesco Medicina deportiva spa
dc.subject.unesco Fisiología humana spa
dc.subject.unesco Atleta spa
dc.description.filiation UEM spa
dc.peerreviewed Si spa


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