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A Diagnostic and Performance System for Soccer: Technical Design and Development.

Alberto Gascón1, Álvaro Marco1,2, David Buldain1

  • 1Aragon Institute of Engineering Research, University of Zaragoza, 50018 Zaragoza, Spain.

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Summary

This study introduces a novel insole sensor system for evaluating soccer performance, accurately detecting passing, shooting, and changes of direction. The cost-effective, real-time system aids in injury prevention and player development.

Keywords:
foot kinematicsinertial sensorsmachine learning algorithmssoccer biomechanicswearable technology

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Area of Science:

  • Sports Science
  • Biomechanics
  • Wearable Technology

Background:

  • Accurate assessment of soccer performance is crucial for player development and injury prevention.
  • Existing methods for performance analysis can be costly, impractical, or lack real-time feedback.
  • Wearable inertial sensors offer a promising avenue for objective performance evaluation.

Purpose of the Study:

  • To develop and validate a novel system using wearable inertial sensors in insoles for diagnosing and evaluating soccer performance.
  • To focus on key soccer actions: passing, shooting, and changes of direction.
  • To provide real-time data analysis and performance feedback for professional athletes and practitioners.

Main Methods:

  • Integration of low-power Inertial Measurement Unit (IMU) sensors and Bluetooth Low Energy (BLE) into player insoles.
  • Development of bespoke algorithms for processing kinematic data and detecting specific soccer events.
  • Utilizing a cloud-based architecture for real-time data analysis and performance feedback.
  • Controlled testing with nine professional soccer players from the SD Huesca women's team.

Main Results:

  • High accuracy achieved in detecting ball-striking events (passing and shooting) and changes of direction (CoDs).
  • Algorithm performance enhanced using adaptive thresholds and ensemble neural network models.
  • The system demonstrated significant cost reduction and improved practicality compared to existing solutions.
  • Real-time evaluation capabilities were successfully implemented.

Conclusions:

  • The developed insole-based wearable system offers a practical and cost-effective solution for real-time soccer performance evaluation.
  • The system shows potential for injury prevention, player rehabilitation, and performance optimization in professional soccer.
  • Further research with larger datasets and diverse sports is recommended to enhance generalizability and expand applications.