Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth

Kelli L Cain, Edith Bonilla, Terry L Conway, Jasper Schipperijn, Carrie M Geremia, Alexandra Mignano, Jacqueline Kerr, James F Sallis

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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.

Original languageEnglish
JournalPediatric Exercise Science
Volume30
Issue number2
Pages (from-to)288-295
ISSN0899-8493
DOIs
Publication statusPublished - 2018

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Keywords

  • ActiGraph
  • Measurement
  • Methods
  • Physical activity
  • Sitting
  • Humans
  • Child, Preschool
  • Male
  • Exercise
  • Adolescent
  • Female
  • Accelerometry/instrumentation
  • Child
  • Sedentary Behavior

Cite this

Cain, K. L., Bonilla, E., Conway, T. L., Schipperijn, J., Geremia, C. M., Mignano, A., ... Sallis, J. F. (2018). Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth. Pediatric Exercise Science, 30(2), 288-295. https://doi.org/10.1123/pes.2017-0132
Cain, Kelli L ; Bonilla, Edith ; Conway, Terry L ; Schipperijn, Jasper ; Geremia, Carrie M ; Mignano, Alexandra ; Kerr, Jacqueline ; Sallis, James F. / Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth. In: Pediatric Exercise Science. 2018 ; Vol. 30, No. 2. pp. 288-295.
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abstract = "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.",
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Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth. / Cain, Kelli L; Bonilla, Edith; Conway, Terry L; Schipperijn, Jasper; Geremia, Carrie M; Mignano, Alexandra; Kerr, Jacqueline; Sallis, James F.

In: Pediatric Exercise Science, Vol. 30, No. 2, 2018, p. 288-295.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Defining Accelerometer Nonwear Time to Maximize Detection of Sedentary Time in Youth

AU - Cain, Kelli L

AU - Bonilla, Edith

AU - Conway, Terry L

AU - Schipperijn, Jasper

AU - Geremia, Carrie M

AU - Mignano, Alexandra

AU - Kerr, Jacqueline

AU - Sallis, James F

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - ActiGraph

KW - Measurement

KW - Methods

KW - Physical activity

KW - Sitting

KW - Humans

KW - Child, Preschool

KW - Male

KW - Exercise

KW - Adolescent

KW - Female

KW - Accelerometry/instrumentation

KW - Child

KW - Sedentary Behavior

U2 - 10.1123/pes.2017-0132

DO - 10.1123/pes.2017-0132

M3 - Journal article

VL - 30

SP - 288

EP - 295

JO - Pediatric Exercise Science

JF - Pediatric Exercise Science

SN - 0899-8493

IS - 2

ER -