Estimating physical activity in youth using an ankle accelerometer.

Autor/inn/en	Crouter, Scott E.; Oody, Jennifer Flynn; Bassett, David R. Jr.
Titel	Estimating physical activity in youth using an ankle accelerometer. Gefälligkeitsübersetzung: Schätzung von körperlicher Aktivität bei Jugendlichen mithilfe eines Spunggelenkakzelerometers.
Quelle	In: Journal of sports sciences, 36 (2018) 19, S. 2265-2271 PDF als Volltext Link als defekt meldenVerfügbarkeit
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0264-0414; 1466-447X
DOI	10.1080/02640414.2018.1449091
Schlagwörter	Validität; Vergleichsuntersuchung; Kind; Energiestoffwechsel; Gesundheit; Gesundheitserziehung; Gesundheitsförderung; Energieverbrauch; Sensor; Beschleunigung; Gesundheitssport; Kinder- und Jugendsport; Sportaktivität; Sportwissenschaft; Analyse; Messinstrument; Jugendlicher
Abstract	This study developed and validated a vector magnitude (VM) two-regression model (2RM) for use with an ankle-worn ActiGraph accelerometer. For model development, 181 youth (mean ± SD; age, 12.0 ± 1.5 yr) completed 30 min of supine rest and 2-7 structured activities. For cross-validation, 42 youth (age, 12.6 ± 0.8 yr) completed approximately 2 hr of unstructured physical activity (PA). PA data were collected using an ActiGraph accelerometer, (non-dominant ankle) and the VM was expressed as counts/5-s. Measured energy expenditure (Cosmed K4b2) was converted to youth METs (METy; activity VO2 divided by resting VO2). A coefficient of variation (CV) was calculated for each activity to distinguish continuous walking/running from intermittent activity. The ankle VM sedentary behavior threshold was (=10 counts/5-s, and a CV(=15 counts/5-s was used to identify walking/running. The ankle VM2RM was within 0.42 METy of measured METy during the unstructured PA (P ) 0.05). The ankle VM2RM was within 5.7 min of measured time spent in sedentary, LPA, MPA, and VPA (P ) 0.05). Compared to the K4b2, the ankle VM2RM provided similar estimates to measured values during unstructured play and provides a feasible wear location for future studies.
Erfasst von	Bundesinstitut für Sportwissenschaft, Bonn
Update	2019/1