Validation of MET estimates and step measurement using the ActivPAL physical activity logger
Deutscher übersetzter Titel: | Validitation der MET-Bewertung und Schrittzählung bei der Nutzung des ActivPAL zur Messung der körperlichen Aktivität |
---|---|
Autor: | Harrington, Deirdre M.; Welk, Gregory J.; Donnelly, Alan E. |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 29 (2011), 6, S. 627-633, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640414.2010.549499 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201404003976 |
Quelle: | BISp |
Abstract
The purpose of this study was to determine the validity of the metabolic equivalent (MET) equation and step rate function of the ActivPALTM physical activity logger in a group of females. Using a standard treadmill protocol, 62 females aged 15–25 years walked on a treadmill at speeds between 3.2 and 7.0 km * h-1 while wearing an ActivPAL. Oxygen consumption was measured using expired gas analysis at each speed and METs for each speed were estimated based on each participant’s own resting metabolic rate. A sub-set of 18 participants also wore an Actigraph. Results showed that the in-built equation in the ActivPAL significantly underestimated (P < 0.001) METs under treadmill conditions at higher intensities. The ActivPAL equation is based on step rate yet the relationship between counts and measured METs (r=0.76; P < 0.001) is stronger than that between steps and measured METs (r=0.59; P < 0.001). Both the ActivPAL and Actigraph step functions showed no significant difference (P > 0.05) to video recorded step rate except at the slowest walking speed where the Actigraph significantly underestimated steps (P < 0.05). The development of a new equation based on the counts–METs relationship that includes a variety of speeds and activities would be useful. The ActivPAL step function performs better than the Actigraph at the slowest walking speed under treadmill conditions. Verf.-Referat