Cut Points of the Actigraph GT9X for Moderate and Vigorous Intensity Physical Activity at Four Different Wear Locations

Accelerometer cut points are an important consideration for distinguishing the intensity of activity into categories such as moderate and vigorous. It is well-established in the literature that these cut points depend on a variety of factors, including age group, device, and wear location. The Actigraph GT9X is a newer model accelerometer that is used for physical activity research, but existing cut points for this device are limited since it is a newer device. Furthermore, there is not existing data on cut points for the GT9X at the ankle or foot locations, which offers some potential benefit for activities that do not involve arm and/or core motion. A total of N = 44 adults completed a four-stage treadmill protocol while wearing Actigraph GT9X sensors at four different locations: foot, ankle, wrist, and hip. Metabolic Equivalent of Task (MET) levels assessed by indirect calorimetry along with Receiver Operating Characteristic (ROC) curves were used to establish cut points for moderate and vigorous intensity for each wear location of the GT9X. Area under the ROC curves indicated high discrimination accuracy for each case.

This is an Accepted Manuscript of an article published by Taylor & Francis in 'Journal of Sports Sciences' on 2019-12-23, available online: https://www.tandfonline.com/10.1080/02640414.2019.1707956.

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Work Title Cut Points of the Actigraph GT9X for Moderate and Vigorous Intensity Physical Activity at Four Different Wear Locations
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Open Access
Creators
  1. Matthew B. Rhudy
  2. Scott B. Dreisbach
  3. Matthew D. Moran
  4. Marissa J. Ruggiero
  5. Praveen Veerabhadrappa
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Informa UK Limited
Publication Date December 23, 2019
Publisher Identifier (DOI)
  1. 10.1080/02640414.2019.1707956
Source
  1. Journal of Sports Sciences
Deposited January 13, 2022

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  • Created
  • Added M Rhudy - Cut Points of.pdf
  • Added Creator Matthew B. Rhudy
  • Added Creator Scott B. Dreisbach
  • Added Creator Matthew D. Moran
  • Added Creator Marissa J. Ruggiero
  • Added Creator Praveen Veerabhadrappa
  • Published
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