Print Email Facebook Twitter Concurrent validity of the PAM accelerometer relative to the MTI Actigraph using oxygen consumption as a reference Title Concurrent validity of the PAM accelerometer relative to the MTI Actigraph using oxygen consumption as a reference Author Slootmaker, S.M. Chin A Paw, M.J.M. Schuit, A.J. van Mechelen, W. Koppes, L.L.J. TNO Kwaliteit van Leven Publication year 2009 Abstract The purpose of this study was to examine the concurrent validity of the Personal Activity Monitor (PAM) accelerometer relative to the Actigraph accelerometer using oxygen consumption as a reference, and to assess the test-retest reliability of the PAM. Thirty-two fit, normal weight adults (aged 21-54) performed two activities, treadmill walking and stair walking, while wearing the PAM, the Actigraph and the Cosmed K4b2. Correlation coefficients and agreement in absolute energy expenditure (EE) levels between PAM, Actigraph and Cosmed were calculated. The test-retest reliability was examined among 296 PAM's using a laboratory shaker. Intraclass correlation coefficients (ICC) and coefficient of variation (CV) were determined. Correlations for treadmill walking and stair walking, respectively, were r 2=0.95 and r2=0.65 for PAM with Actigraph, r 2=0.82 and r2=0.93 for PAM with VO2 and r 2=0.64 and 0.74 for Actigraph with VO2. Both the PAM and Actigraph underestimated EE during treadmill and stair walking by a substantial amount. The test-retest reliability of the PAM was high [ICC=0.80; 95% confidence interval (CI) (0.28;0.92) and intra-CV=1.5%]. The PAM and Actigraph accelerometer are comparable in assessing bodily movement during treadmill and stair walking. The PAM is a valid device to rank subjects in EE and can be useful in collecting objective data to monitor habitual physical activity. Copyright © 2009 The Authors. Subject WorkplaceEnergy expenditurePhysical activityReliability measurementStair walkingTreadmill walkingAccelerationAdultEexerciseInstrumentationMiddle agedMonitoringNetherlandsOxygen consumptionPhysiologyReproducibilitySatistical modelVlidation studyAcceleration To reference this document use: http://resolver.tudelft.nl/uuid:0b528231-fad3-4407-bbfa-b89ee0bf304a DOI https://doi.org/10.1111/j.1600-0838.2007.00740.x TNO identifier 280003 ISSN 0905-7188 Source Scandinavian Journal of Medicine and Science in Sports, 19 (1), 36-43 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.