Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth
| Autor: | James F. Sallis, Edith Bonilla, Jacqueline Kerr, Kelli L. Cain, Jasper Schipperijn, Alexandra M. Mignano, Terry L. Conway, Carrie M. Geremia |
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| Rok vydání: | 2018 |
| Předmět: |
Male
medicine.medical_specialty Adolescent Physical activity Physical Therapy Sports Therapy and Rehabilitation Accelerometer Sitting 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Accelerometry Methods medicine Humans Orthopedics and Sports Medicine 030212 general & internal medicine Child Exercise Mathematics Sedentary time Measurement Vertical axis Accelerometry/instrumentation 030229 sport sciences Sedentary behavior ActiGraph Child Preschool Pediatrics Perinatology and Child Health Female Sedentary Behavior Normal filter |
| Zdroj: | Cain, K L, Bonilla, E, Conway, T L, Schipperijn, J, Geremia, C M, Mignano, A, Kerr, J & Sallis, J F 2018, ' Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth ', Pediatric Exercise Science, vol. 30, no. 2, pp. 288-295 . https://doi.org/10.1123/pes.2017-0132 |
| ISSN: | 1543-2920 0899-8493 |
| Popis: | Purpose:The present study examined various accelerometer nonwear definitions and their impact on detection of sedentary time using different ActiGraph models, filters, and axes.Methods:In total, 61 youth (34 children and 27 adolescents; aged 5–17 y) wore a 7164 and GT3X+ ActiGraph on a hip-worn belt during a 90-minute structured sedentary activity. Data from GT3X+ were downloaded using the Normal filter (N) and low-frequency extension (LFE), and vertical axis (V) and vector magnitude (VM) counts were examined. Nine nonwear definitions were applied to the 7164 model (V), GT3X+LFE (V and VM), and GT3X+N (V and VM), and sedentary estimates were computed.Results:The GT3X+LFE-VM was most sensitive to movement and could accurately detect observed sedentary time with the shortest nonwear definition of 20 minutes of consecutive “0” counts for children and 40 minutes for adolescents. The GT3X+N-V was least sensitive to movement and required longer definitions to detect observed sedentary time (40 min for children and 90 min for adolescents). VM definitions were 10 minutes shorter than V definitions. LFE definitions were 40 minutes shorter than N definitions in adolescents.Conclusion:Different nonwear definitions are needed for children and adolescents and for different model-filter-axis types. Authors need to consider nonwear definitions when comparing prevalence rates of sedentary behavior across studies. |
| Databáze: | OpenAIRE |
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