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IPEN Adolescent Accelerometer Data Collection Guidelines

 Filter:

 MUST USE the Low Frequency Extension with new generation Actigraphs (GT1M,

ActiTrainer, GT3X, GT3X+). Doesn’t apply to old generation devices.

 Apply during initialization with GT1M & GT3X

 Apply during or post-download with GT3X+

Kelli L. Cain, San Diego May 2014

 The Coordinating Center conducted a

model/filter comparison study

 27 adolescents wore a 7164 and GT3X+ on the

same belt for 3 days in free-living environment

 Data are showing that the 7164 and

GT3X+Normal filter are not comparable (e.g., 9

min/day less MVPA with the GT3X+)

 Applying the Low Frequency Extension reduces

these differences!

See LFE paper in adults:

Cain KL, Conway TL, Adams MA, Husak LE, Sallis JF.

Comparison of older and newer generations of

ActiGraph accelerometers with the normal filter

and the low frequency extension. International

Journal of Behavioral Nutrition and Physical

Activity 2013, 10:51.

http://www.ijbnpa.org/content/pdf/1479-5868-

10-51.pdf

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ActiGraph ACTITRAINER Manuale Utente Pagina 6