Criterion Validity of Catapult ClearSky T6 Local Positioning System for Measuring Inter-Unit Distance

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Hodder, Ryan ORCID: 0000-0001-8847-5876, Ball, Kevin ORCID: 0000-0001-5661-9388 and Serpiello, Fabio ORCID: 0000-0001-8919-3053 (2020) Criterion Validity of Catapult ClearSky T6 Local Positioning System for Measuring Inter-Unit Distance. Sensors, 20 (13). ISSN 1424-8220


The validity of a local positioning system (LPS) to measure inter-unit distance was investigated during a team sport movement circuit. Eight recreationally active, female indoor team-sport players completed a circuit, comprising seven types of movements (walk, jog, jump, sprint, 45° change of direction and shuffle), on an indoor court. Participants wore a receiver tag (ClearSky T6, Catapult Sports) and seven reflective markers, to allow for a comparison with the reference system (©Vicon Motion Systems, Oxford Metrics, UK). Inter-unit distance was collected for each combination of participants. Validity was assessed via root mean square error, mean bias and percentage of variance accounted for, both as an overall dataset and split into distance bands. The results presented a mean root mean square error of 0.20 ± 0.05 m, and mean bias detected an overestimation for all distance bands. The LPS shows acceptable accuracy for measuring inter-unit distance, opening up opportunities to utilise player tracking for tactical variables indoors.

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Item type Article
DOI 10.3390/s20133693
Official URL
Subjects Historical > FOR Classification > 1106 Human Movement and Sports Science
Current > Division/Research > Institute for Health and Sport
Keywords multipath propagation ; inter-unit distance accuracy ; team tactical synchronisation ; inter-playerinteractions ; coordination tendencies
Citations in Scopus 13 - View on Scopus
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