title: Accuracy of accelerometer regression models in predicting energy expenditure and METs in children and youth.
abstract: This study examined the validity of commonly used regression equations for the Actigraph and Actical accelerometers in predicting energy expenditure (EE) in children and adolescents. Sixty healthy (8-16 yrs) participants completed four treadmill (TM) and five self-paced activities of daily living (ADL). Four Actigraph (AG) and three Actical (AC) regression equations were used to estimate EE. Bias (± 95% CI) and root mean squared errors were used to assess the validity of the regression equations compared with indirect calorimetry. For children, the Freedson (AG) model accurately predicted EE for all activities combined and the Treuth (AG) model accurately predicted EE for TM activities. For adolescents, the Freedson model accurately predicted EE for TM activities and the Treuth model accurately predicted EE for all activities and for TM activities. No other equation accurately estimated EE. The percent agreement for the AG and AC equations were better for light and vigorous compared with moderate intensity activities. The Trost (AG) equation most accurately classified all activity intensity categories. Overall, equations yield inconsistent point estimates of EE.
authors.affiliation: Dept. of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA.
authors.forename: Sofiya
authors.initials: S
authors.lastname: Alhassan
authors.forename: Kate
authors.initials: K
authors.lastname: Lyden
authors.forename: Cheryl
authors.initials: C
authors.lastname: Howe
authors.forename: Sarah
authors.initials: S
authors.lastname: Kozey Keadle
authors.forename: Ogechi
authors.initials: O
authors.lastname: Nwaokelemeh
authors.forename: Patty S
authors.initials: PS
authors.lastname: Freedson
mesh_terms: D000054:Acceleration; D061725:Accelerometry / Q000592:standards*; D000203:Activities of Daily Living; D000293:Adolescent; D000367:Age Factors; D000886:Anthropometry; D015992:Body Mass Index; D002648:Child; D015331:Cohort Studies; D004734:Energy Metabolism / Q000502:physiology*; D005080:Exercise Test / Q000379:methods* / Q000592:standards; D005260:Female; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D011237:Predictive Value of Tests; D012016:Reference Values; D012044:Regression Analysis; D012737:Sex Factors