Validity and reliability of GPS for measuring instantaneous velocity during acceleration, deceleration, and constant motion

Full text for this resource is not available from the Research Repository.

Varley, Matthew C, Fairweather, Ian and Aughey, Robert ORCID: 0000-0002-0285-8516 (2011) Validity and reliability of GPS for measuring instantaneous velocity during acceleration, deceleration, and constant motion. Journal of Sports Sciences, 30 (2). pp. 121-127. ISSN 0264-0414 (print) 1466-447X (online)

Abstract

In this study, we assessed the validity and reliability of 5 and 10 Hz global positioning systems (GPS) for measuring instantaneous velocity during acceleration, deceleration, and constant velocity while straight-line running. Three participants performed 80 running trials while wearing two GPS units each (5 Hz, V2.0 and 10 Hz, V4.0; MinimaxX, Catapult Innovations, Scoresby, VIC, Australia). The criterion measure used to assess GPS validity was instantaneous velocity recorded using a tripod-mounted laser. Validity was established using the standard error of the estimate (±90% confidence limits). Reliability was determined using typical error (±90% confidence limits, expressed as coefficient of variation) and Pearson's correlation. The 10 Hz GPS devices were two to three times more accurate than the 5 Hz devices when compared with a criterion value for instantaneous velocity during tasks completed at a range of velocities (coefficient of variation 3.1–11.3%). Similarly, the 10 Hz GPS units were up to six-fold more reliable for measuring instantaneous velocity than the 5 Hz units (coefficient of variation 1.9–6.0%). Newer GPS may provide an acceptable tool for the measurement of constant velocity, acceleration, and deceleration during straight-line running and have sufficient sensitivity for detecting changes in performance in team sport. However, researchers must account for the inherent match-to-match variation reported when using these devices.

Dimensions Badge

Altmetric Badge

Item type Article
URI https://vuir.vu.edu.au/id/eprint/23469
DOI https://doi.org/10.1080/02640414.2011.627941
Official URL http://www.tandfonline.com/doi/abs/10.1080/0264041...
Subjects Historical > FOR Classification > 1106 Human Movement and Sports Science
Current > Division/Research > College of Sports and Exercise Science
Keywords ResPubID25462, instantaneous velocity, accuracy, motion analysis
Citations in Scopus 385 - View on Scopus
Download/View statistics View download statistics for this item

Search Google Scholar

Repository staff login