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Concurrent validity and between-device reliability of the Catapult Vector S8 GNSS device
Susanne Ellens1, Codey Moran2, Matthew C Varley1
1Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Australia.
Plos One
|October 30, 2025
Summary
The Catapult Vector S8 GNSS device accurately measures athlete distance, speed, and acceleration. This study confirms its validity and reliability for team sports performance analysis.
Area of Science:
- Sports Science
- Biomechanics
- Performance Analysis
Background:
- Accurate measurement of athlete movement is crucial for performance analysis.
- Global Navigation Satellite System (GNSS) devices are commonly used in team sports.
- Validation of new GNSS devices ensures reliable data collection.
Purpose of the Study:
- To assess the concurrent validity of the Catapult Vector S8 GNSS device.
- To evaluate the between-device reliability of the Catapult Vector S8.
- To determine the accuracy of distance, speed, and acceleration measurements during sport-specific activities.
Main Methods:
- Twelve sub-elite male team sport athletes participated.
- Athletes performed linear sprints, change of direction drills, and a modified small-sided game.
- Validity was assessed against VICON motion capture and Stalker ATS radar systems.
- Reliability was evaluated using interclass correlation coefficients (ICC) and typical error (TE%).
Main Results:
- The Vector S8 showed good validity with minimal errors for instantaneous distance, speed, and acceleration.
- Accumulated distance exhibited a small underestimation (mean bias -1.42%) with high precision.
- Between-device reliability was excellent (ICC ≥ 0.95) with good precision (TE as CV < 3.13%).
Conclusions:
- The Catapult Vector S8 GNSS device is a valid and reliable tool for measuring key performance metrics.
- The device provides accurate data for distance, speed, and acceleration in team sport movements.
- This is the first validation study of the Catapult Vector S8, supporting its use in sports science.
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