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      Wrist-based cut-points for moderate- and vigorous-intensity ambulatory physical activity for the Actical accelerometer in adults

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          Abstract

          Wrist-based accelerometers are increasingly used to assess physical activity (PA) in population-based studies; however, cut-points to translate wrist-based accelerometer counts into PA intensity categories are still needed. The purpose of this study was to determine wrist-based cut-points for moderate and vigorous intensity ambulatory PA in adults for the Actical accelerometer. Healthy adults (n=24) completed a four-phase treadmill exercise protocol (1.9, 3.0, 4.0, and 5.2 mph) while wearing an Actical accelerometer on their wrist. MET levels were assessed by indirect calorimetry. Receiver operating characteristics (ROC) curves were generated to determine accelerometer counts that maximized sensitivity and specificity for classification of moderate (≥3 METs) and vigorous (>6 METs) ambulatory activity. The area under the ROC curves to discriminate moderate and vigorous intensity ambulatory activity were 0.93 (95% CI: 0.90–0.97; p <0.001) and 0.96 (95% CI: 0.94–0.99; p<0.001), respectively. The identified cut-point for moderate intensity ambulatory activity was 1031 counts/minute, which had a corresponding sensitivity and specificity of 85.6% and 87.5%, respectively. The identified cut-point for vigorous intensity ambulatory activity was 3589 counts/minute, which had a corresponding sensitivity and specificity of 88.0% and 98.7%, respectively. This study established intensity-specific cut-points for wrist-based wear of the Actical accelerometer which are recommended for quantification of moderate and vigorous intensity ambulatory activity.

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          Author and article information

          Journal
          8405364
          5329
          J Sports Sci
          J Sports Sci
          Journal of sports sciences
          0264-0414
          1466-447X
          8 April 2017
          23 February 2017
          January 2018
          01 January 2019
          : 36
          : 2
          : 206-212
          Affiliations
          [1 ]Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, New York, NY
          [2 ]Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY
          [3 ]Department of Psychiatry, Stony Brook University, Stony Brook, NY
          Author notes
          Correspondence: Keith M. Diaz; Columbia University Medical Center; 622 West 168 th Street, PH9-301, New York, NY 10032; Phone: 212-305-1170; Fax: 212-305-3172; kd2442@ 123456columbia.edu

          Keith M. Diaz; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9–301, New York, NY 10032; Phone: 212-305-1170; Fax: 212-305-3172; kd2442@ 123456cumc.columbia.edu

          David J. Krupka; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9-314, New York, NY 10032; Phone: 212-342-4492; Fax: 212-305-3172; djk2137@ 123456columbia.edu

          Melinda J. Chang; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9-304, New York, NY 10032; Phone: 212-342-4503; Fax: 212-305-3172; mjc2205@ 123456cumc.columbia.edu

          Ian M. Kronish; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9-311, New York, NY 10032; Phone: 212- 342-1335; Fax: 212-305-3172; ik2293@ 123456cumc.columbia.edu

          Nathalie Moise; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9-321, New York, NY 10032; Phone: 212- 342-2889; Fax: 212-305-3172; nm2562@ 123456cumc.columbia.edu

          Jeff Goldsmith; Department of Biostatistics, Mailman School of Public Health, Columbia University, 722 West 168 th Street, 6 th Floor, New York, NY; Phone: 212-342-4599; Fax: 212-305-3172; jeff.goldsmith@ 123456columbia.edu

          Joseph E. Schwartz; Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Medical Center, 622 West 168 th Street, PH9-301, New York, NY 10032; Phone: 212-305-1170; Fax: 212-305-3172; jes2226@ 123456cumc.columbia.edu ; Applied Behavioral Medicine Research Institute, Stony Brook University, Stony Brook, NY 11794-8790; Phone: (631) 632-8839; Joseph.Schwartz@ 123456StonyBrook.edu

          Article
          PMC5568991 PMC5568991 5568991 nihpa861445
          10.1080/02640414.2017.1293279
          5568991
          28282744
          fb358e8a-9131-44ec-8c33-68483ef257c2
          History
          Categories
          Article

          physical activity,accelerometer,calibration,validation,adults

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