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Concurrent validity and between-device reliability of the Catapult Vector S8 GNSS device.

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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.

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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.