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Int J Sports Med 2012; 33(08): 635-640
DOI: 10.1055/s-0032-1306326
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Validation of a Real-Time Video Analysis System for Soccer

A. Redwood-Brown
1   Sport, Health and Performance Enhancement (SHAPE) Research Group, School of Science and Technology Nottingham Trent University, Nottingham, United Kingdom
,
W. Cranton
1   Sport, Health and Performance Enhancement (SHAPE) Research Group, School of Science and Technology Nottingham Trent University, Nottingham, United Kingdom
,
C. Sunderland
1   Sport, Health and Performance Enhancement (SHAPE) Research Group, School of Science and Technology Nottingham Trent University, Nottingham, United Kingdom
› Author Affiliations
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Publication History



accepted after revision 10 February 2012

Publication Date:
17 April 2012 (online)

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Abstract

The aim of the current study was to determine the validity of an automated multiple-camera tracking system (Venatrack™), for the measurement of speed during soccer. 18 recreationally active males (mean age 27±8.6 years) performed a series of runs (total 391), representative of the movements made by soccer players, at given speeds. The speeds recorded by the automatic tracking system were compared statistically with speed measurements made using timing gates. For all the runs combined the mean speed recorded by the automated system was 15.4±5.5 km·h − 1 compared with the recorded mean speed of 15.2±5.4 km·h − 1 and the mean difference and 95% limits of agreement were − 0.25±0.64 km·h − 1. Pearson correlations (r) among timing gate speed and automated tracking speed were ≥ 0.99 (P<0.001), except the 20 m sprint, with 90° turn (r > 0.7). For the zig-zag shuttle the mean speed recorded by the automated system was 21.2±3.5 km·h − 1 compared with the recorded mean speed of 20.8±3.4 km·h − 1. The results demonstrate good validity over a range of soccer specific movements and speeds, up to and including sprinting. The results of this study suggest that the automated system (Venatrack™) is a valid real-time motion analysis system for tracking player movements during soccer.

Key words

football - time-motion analysis - tracking - multiple-camera system
 

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