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Validity of a Wearable Accelerometer Device to Measure Average Acceleration Values During High-Speed Running

Alexander, Jeremy P.; Hopkinson, Trent L.; Wundersitz, Daniel W. T.; Serpell, Benjamin G.; Mara, Jocelyn K.; Ball, Nick B.

Journal of Strength and Conditioning Research: November 2016 - Volume 30 - Issue 11 - p 3007–3013
doi: 10.1519/JSC.0000000000001396
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Alexander, JP, Hopkinson, TL, Wundersitz, DWT, Serpell, BG, Mara, JK, and Ball, NB. Validity of a wearable accelerometer device to measure average acceleration values during high-speed running. J Strength Cond Res 30(11): 3007–3013, 2016—The aim of this study was to determine the validity of an accelerometer to measure average acceleration values during high-speed running. Thirteen subjects performed three sprint efforts over a 40-m distance (n = 39). Acceleration was measured using a 100-Hz triaxial accelerometer integrated within a wearable tracking device (SPI-HPU; GPSports). To provide a concurrent measure of acceleration, timing gates were positioned at 10-m intervals (0–40 m). Accelerometer data collected during 0–10 m and 10–20 m provided a measure of average acceleration values. Accelerometer data was recorded as the raw output and filtered by applying a 3-point moving average and a 10-point moving average. The accelerometer could not measure average acceleration values during high-speed running. The accelerometer significantly overestimated average acceleration values during both 0–10 m and 10–20 m, regardless of the data filtering technique (p < 0.001). Body mass significantly affected all accelerometer variables (p < 0.10, partial η2 = 0.091–0.219). Body mass and the absence of a gravity compensation formula affect the accuracy and practicality of accelerometers. Until GPSports-integrated accelerometers incorporate a gravity compensation formula, the usefulness of any accelerometer-derived algorithms is questionable.

1Brumbies Rugby, University of Canberra, Bruce, Australia;

2Centre for Exercise and Sport Science, Deakin University, Burwood, Australia;

3La Trobe Rural Health School, College of Science, Health and Engineering, La Trobe University, Flora Hill Campus, Bendigo, Victoria, Australia; and

4Research Institute for Sport and Exercise, University of Canberra, Bruce, Australia

Address correspondence to Jeremy P. Alexander, jeremyalexander60@gmail.com.

Copyright © 2016 by the National Strength & Conditioning Association.