The accuracy of a low-cost GPS system during football-specific movements

Schulze, Emiel, Julian, Ross ORCID: 0000-0002-8558-7132 and Skorski, Sabrina (2021) The accuracy of a low-cost GPS system during football-specific movements. Journal of Sports Science and Medicine, 20. pp. 126-132. doi:10.52082/jssm.2021.126 (In Press)

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Abstract

An affordable player monitoring solution could make the evaluation of external loading more accessible across multiple levels of football (soccer). The present study aimed to determine the accuracy of a newly designed and low-cost Global Positioning System (GPS) whilst performing match-specific movement patterns. Sixteen professional male football players (24 ± 3 years) were assigned a GPS device (TT01, Tracktics GmbH, Hofheim, Germany) and completed two experimental trials. In each trial, a continuous protocol including seven movements (sideways cornering, diagonal cornering, accelerating, decelerating, backwards jogging, shuttle running, and skipping) adding up to 500 m, was completed. Time-motion data was compared with criterion distance and velocity (photo-cell timing gates and radar). Validity was assessed through the standard error of the estimate (SEE) and reliability through the coefficient of variation (CV; both with 95% confidence limits). For the total distance covered during the protocol, the system was found to be valid (SEE = 3.1% [2.2; 5.8]) and reliable (intra-device CV = 2.0% [1.2; 7.6]). Similar results were found for velocity (SEE = 3.4% [2.6; 4.8], CV = 4.7% [3.2; 8.5]). In conclusion, the present GPS system, a low-cost solution, was found to be a valid and reliable tool for measuring physical loading during football-specific movements.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Soccer; Team sports; External load; Precision; Motion analysis
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports > GV861 Ball games: Baseball, football, golf, etc.
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Health, Life Sciences, Sport and Wellbeing
Depositing User: Rhiannon Goodland
Date Deposited: 18 Mar 2021 16:04
Last Modified: 01 Jul 2021 10:45
URI: http://eprints.glos.ac.uk/id/eprint/9484

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