Converting between estimates of moderate-to-vigorous physical activity derived from raw accelerations measured at the wrist and from ActiGraph counts measured at the hip: the Rosetta Stone.

Autor/inn/en	Brazendale, Keith; Beets, Michael W.; Rowlands, Alex V.; Chandler, Jessica L.; Fairclough, Stuart J.; Boddy, Lynne M.; Olds, Tim S.; Parfitt, Gaynor; Noonan, Robert J.; Downs, Samantha J.; Cliff, Dylan P.
Titel	Converting between estimates of moderate-to-vigorous physical activity derived from raw accelerations measured at the wrist and from ActiGraph counts measured at the hip: the Rosetta Stone. Gefälligkeitsübersetzung: Umrechnen zwischen Schätzungen von moderater bis leicht anstrengender körperlicher Aktivität abgeleitet von Rohdaten der Akzelerometrie gemessen am Handgelenk und an der Hüfte mithilfe des Actigraph. Der Rosetta-Stein.
Quelle	In: Journal of sports sciences, 36 (2018) 22, S. 2603-2607 PDF als Volltext Link als defekt meldenVerfügbarkeit
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0264-0414; 1466-447X
DOI	10.1080/02640414.2018.1470373
Schlagwörter	Vergleichsuntersuchung; Gesundheit; Gesundheitserziehung; Kind; Sportwissenschaft; Übergewicht; Analyse; Sitzen; Gesundheitssport; Gesundheitsförderung; Kind; Gesundheit; Gesundheitserziehung; Gesundheitsförderung; Sitzen; Übergewicht; Bewegungsaktivität; Gesundheitssport; Kinder- und Jugendsport; Sportwissenschaft; Analyse; Methodenvergleich
Abstract	The ability to compare published group-level estimates of objectively measured moderate-to-vigorous physical activity (MVPA) across studies continues to increase in difficulty. The objective of this study was to develop conversion equations and demonstrate their utility to compare estimates of MVPA derived from the wrist and hip. Three studies of youth (N = 232, 9-12yrs, 50% boys) concurrently wore a hip-worn ActiGraph and a wrist-worn GENEActiv for 7-days. ActiGraph hip count data were reduced using four established cutpoints. Wrist accelerations were reduced using the Hildebrand MVPA 200 mg threshold. Conversion equations were developed on a randomly selected subsample of 132 youth. Equations were cross-validated and absolute error, absolute percent error, and modified Bland-Altman plots were evaluated for conversion accuracy. Across equations R2adj was 0.51-0.56 with individual-level absolute error in minutes ranging from 7 (wrist-to-hip Puyau) to 14.5 minutes (wrist-to-hip Freedson 3MET) and absolute percent differences ranging from 13.9%-24.5%. Group-level cross-validation to convert hip-to-wrist MVPA resulted in average absolute percent errors ranging from 3.1%-4.9%. Conversion of wrist-to-hip MVPA resulted in average absolute percent errors ranging from 3.0%-10.0%. We recommend the use of these equations to compare published estimates of MVPA between the wear-site cut-point combinations presented.
Erfasst von	Bundesinstitut für Sportwissenschaft, Bonn
Update	2019/2