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Comparing different accelerometer cut-points for sedentary time in children

journal contribution
posted on 01.05.2012, 00:00 authored by C Fischer, M Yildirim, Jo SalmonJo Salmon, M Chinapaw
Actigraph accelerometers are hypothesized to be valid measurements for assessing children's sedentary time. However, there is considerable variation in accelerometer cut-points used. Therefore, we compared the most common accelerometer sedentary cut-points of children performing sedentary behaviors. Actigraph Actitrainer uniaxial accelerometers were used to measure children's activity intensity (29 children, 5-11 years old) during different activities, namely playing computer games, nonelectronic sedentary games, watching television and playing outdoors. A structured protocol was the criterion for assessing the validity of four common cut-points (100, 300, 800, 1100 counts/minute). The median counts during all sedentary behaviors were below the lowest comparison cut-point of 100 cpm. The 75th percentile values for the sedentary behaviors were always below the cut-point of 300 cpm. Our results suggest that the cut-point of <100 cpm is the most appropriate.

History

Journal

Pediatric exercise science

Volume

24

Issue

2

Pagination

220 - 228

Publisher

Human Kinetics

Location

Champaign, Ill.

ISSN

0899-8493

eISSN

1543-2920

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2012, Human Kinetics, Inc.