Raw Accelerometer Data Analysis with GGIR R-package: Does Accelerometer Brand Matter?
Alex V Rowlands, Tom Yates, Melanie Davies, Kamlesh Khunti, Charlotte L Edwardson
Medicine & Science in Sports & Exercise | LIPPINCOTT WILLIAMS & WILKINS | Published : 2016
PURPOSE: This study aimed to determine the agreement between outputs from contemporaneous measures of acceleration from wrist-worn GENEActiv and ActiGraph accelerometers when processed using the GGIR open source package. METHODS: Thirty-four participants wore a GENEActiv and an ActiGraph GT3X+ on their nondominant wrist continuously for 2 d to ensure the capture of one 24-h day and one nocturnal sleep. GENEActiv.bin files and ActiGraph .csv files were analyzed with R-package GGIR version 1.2-0. Key outcome variables were as follows: wear time, average magnitude of dynamic wrist acceleration (Euclidean norm minus one [ENMO]), percentile distribution of accelerations, time spent across acceler..View full abstract
This research was supported by the National Institute for Health Research (NIHR) Diet, Lifestyle and Physical Activity Biomedical Research Unit based at University Hospitals of Leicester and Loughborough University, the National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care-East Midlands (NIHR CLAHRC-EM), and the Leicester Clinical Trials Unit. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR, or the Department of Health. The results of the present study do not constitute endorsement by the authors or the American College of Sports Medicine of the products described in this article.