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Georg Ogris1, Roland Leser, Brian Horsak

  • 1Centre for Sport Science and University Sports, University of Vienna, Austria.

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|August 22, 2012
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Summary
This summary is machine-generated.

This study assessed the accuracy of the local position measurement (LPM) tracking system for sports performance analysis. While acceptable for average velocity, LPM shows limitations with high dynamic movements and instantaneous speed measurements.

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Area of Science:

  • Sports Science
  • Biomechanics
  • Performance Analysis

Background:

  • Accurate player tracking is crucial for sports performance analysis.
  • Local Position Measurement (LPM) systems are increasingly used in sports.
  • Understanding the error margins of LPM is essential for reliable data interpretation.

Purpose of the Study:

  • To determine the detailed error values of the LPM tracking system.
  • To evaluate LPM accuracy in the context of sports performance analysis.
  • To quantify dependencies of LPM accuracy on player dynamics and field position.

Main Methods:

  • Six amateur male soccer players performed controlled runs and small-sided games.
  • Data collected simultaneously using LPM and VICON motion capture (reference system).
  • Analysis of absolute position error, average velocity error, and maximum speed error.

Main Results:

  • Average absolute position error of LPM was 23.4±20.7 cm.
  • Average velocity estimations varied by 0.01–0.23 km/h; maximum speed errors up to 2.71 km/h.
  • LPM accuracy decreased with high player dynamics and at the field margins.

Conclusions:

  • LPM accuracy is acceptable for general position and average velocity estimations in sports.
  • The system is less reliable for high-dynamic movements and instantaneous velocity measurements.
  • Quantified dependencies provide context for interpreting LPM data in sports performance.