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IPEN Adolescent Accelerometer Data Collection Guidelines

 Nonwear definition:

 Recommendation is 60 minutes of consecutive 0’s to define nonwear time

for all models

Kelli L. Cain, San Diego May 2014

 The Coordinating Center conducted a ‘sitting’ study

to determine a sensitive nonwear definition in youth

 27 adolescents wore a 7164 and a GT3X+ on the

same belt while sitting watching TV for 90 minutes.

Observers verified participants stayed seated

 Data are showing that 100% of sedentary time

during long sitting bouts would be detected with a 60

minute nonwear definition (7164 and GT3X+LFE)

compared to only 89% with 20 minutes and 93% with

30 minutes

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ActiGraph ACTITRAINER Uživatelský manuál Strana 8