title: Comparing the standards of one metabolic equivalent of task in accurately estimating physical activity energy expenditure based on acceleration.
abstract: The purpose of the study is to analyse how the standard of resting metabolic rate (RMR) affects estimation of the metabolic equivalent of task (MET) using an accelerometer. In order to investigate the effect on estimation according to intensity of activity, comparisons were conducted between the 3.5 ml O2· kg-1· min-1and individually measured resting VO2as the standard of 1 MET. MET was estimated by linear regression equations that were derived through five-fold cross-validation using 2 types of MET values and accelerations; the accuracy of estimation was analysed through cross-validation, Bland and Altman plot, and one-way ANOVA test. There were no significant differences in the RMS error after cross-validation. However, the individual RMR-based estimations had as many as 0.5 METs of mean difference in modified Bland and Altman plots than RMR of 3.5 ml O2· kg-1· min-1. Finally, the results of an ANOVA test indicated that the individual RMR-based estimations had less significant differences between the reference and estimated values at each intensity of activity. In conclusion, the RMR standard is a factor that affects accurate estimation of METs by acceleration; therefore, RMR requires individual specification when it is used for estimation of METs using an accelerometer.
authors.affiliation: a Department of Biomedical Engineering , Hanyang University , Seoul , Republic of Korea.
authors.forename: Dohyun
authors.initials: D
authors.lastname: Kim
authors.affiliation: a Department of Biomedical Engineering , Hanyang University , Seoul , Republic of Korea.
authors.forename: Jongshill
authors.initials: J
authors.lastname: Lee
authors.affiliation: b Department of Family Medicine , Hanyang University Medical Center , Seoul , Republic of Korea.
authors.forename: Hoon Ki
authors.initials: HK
authors.lastname: Park
authors.affiliation: a Department of Biomedical Engineering , Hanyang University , Seoul , Republic of Korea.
authors.forename: Dong Pyo
authors.initials: DP
authors.lastname: Jang
authors.affiliation: c Medical Device Convergence Center , Gachon University Gil Medical Center , Incheon , Republic of Korea.
authors.forename: Soohwa
authors.initials: S
authors.lastname: Song
authors.affiliation: d S/W Solution Laboratory, Samsung Advanced Institute of Technology , Suwon , Republic of Korea.
authors.forename: Baek Hwan
authors.initials: BH
authors.lastname: Cho
authors.affiliation: e Fit.Life Inc ., Suwon , Republic of Korea.
authors.forename: Yoo-Suk
authors.initials: YS
authors.lastname: Jung
authors.affiliation: f Medical Informatics, School of Medicine , Ajou University , Suwon , Republic of Korea.
authors.forename: Rae-Woong
authors.initials: RW
authors.lastname: Park
authors.affiliation: g Family Practice and Community Health, School of Medicine , Ajou University , Suwon , Republic of Korea.
authors.forename: Nam-Seok
authors.initials: NS
authors.lastname: Joo
authors.affiliation: a Department of Biomedical Engineering , Hanyang University , Seoul , Republic of Korea.
authors.forename: In Young
authors.initials: IY
authors.lastname: Kim
mesh_terms: D000054:Acceleration; D061725:Accelerometry; D000328:Adult; D002153:Calorimetry, Indirect; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D055686:Metabolic Equivalent
keywords: Acceleration; accelerometer; metabolic equivalent of task; physical activity energy expenditure; resting metabolic rate