A Comparison of Two Global Positioning System Devices for Team-Sport Running Protocols

Willmott A.G.B., James C.A., Bliss A., Leftwich R.A., Maxwell N.S.

Objective: This study investigated the comparability and reliability of global positioning system (GPS) devices during running protocols associated with team sports.

Participants: Fourteen moderately-trained males participated in the study.

Methods: Participants completed three running protocols: 690 m of straight-line movements, a 570 m change of direction (COD) course, and a 642.5 m team-sport simulated circuit (TSSC), on two occasions. They wore a FieldWiz GPS device and a Catapult MinimaxX S4 10-Hz GPS device. The study calculated the typical error of measurement (TE) and coefficient of variation (CV%) between GPS devices for total distance and peak speed. Reliability comparisons were made within FieldWiz GPS devices between sessions.


Small TE were observed between FieldWiz and Catapult GPS devices for total distance and peak speed during straight-line (16.9 m [2%], 1.2 km/h [4%]), COD (31.8 m [6%], 0.4 km/h [2%]), and TSSC protocols (12.9 m [2%], 0.5 km/h [2%]), respectively, with no significant mean bias (p > 0.05).
Small TE were also observed for the FieldWiz GPS device between sessions (p > 0.05) for straight-line (9.6 m [1%], 0.2 km/h [1%]), COD (12.8 m [2%], 0.2 km/h [1%]), and TSSC protocols (6.9 m [1%], 0.6 km/h [2%]), respectively.
Data from the FieldWiz GPS device appears comparable to established devices and reliable across a range of movement patterns associated with team sports.
Conclusion: The study concludes that the FieldWiz GPS device demonstrates comparability to established devices and reliability across various running protocols associated with team sports.

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