Improving Change of Direction Performance in Adolescent Soccer Players Using Markerless Motion Capture

April 15, 2025
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Summary

A recent study published in Frontiers in Sports and Active Living highlights how brief technique modification training can significantly improve change of direction (COD) performance in adolescent soccer players. Using a markerless motion capture system, the study demonstrated measurable improvements in COD mechanics. This research underscores the value of markerless technology like Theia3D for coaches and sports scientists aiming to optimize performance and reduce injury in adolescent athletes.

Research Overview

‍
Study Aim: To evaluate the acute effects of COD technique modification training on kinematics and performance in adolescent male soccer players.

Methods: Twenty-nine junior high male soccer players were divided into two groups:

  • COD Group (CODG): Received 15 minutes of technique-focused COD training.
  • ‍Control Group (CONG): Performed 15 minutes of linear sprinting without direction changes.

Before and after the intervention, both groups completed the Pro-Agility and 20-meter sprint tests. Movement data was collected using a markerless motion capture system enabling detailed analysis of joint angles and center of mass (COM) velocity during COD maneuvers.

Key Findings

  • COD Technique Improved: Players in the CODG group showed reduced final foot contact times, indicating a shorter turning phase which is a key component of COD performance. 
  • ‍Kinematic Enhancements: Post-training analysis revealed greater deceleration during final foot contact, and increased penultimate hipflexion and horizontal COM-foot distance at completion (stopped).
  • ‍Specificity of Training: Sprint and COD times did not change in either group, indicating that repeated training which can lead to gradual changes in kinematics may produce long-term enhancement in performance.

Implications for Soccer Training

This study supports integrating COD technique training into regular practice for youth soccer players. By using tools like Theia3D markerless motion capture, coaches can:

  • Objectively track improvements in biomechanical performance.
  • Identify inefficiencies in real-time and tailor corrective strategies.
  • Optimize technique with minimal disruption to training flow.

The Role of Theia3D in Movement Analysis 

Markerless motion capture systems like Theia3D provide several advantages for performance and sports biomechanics research:

  • No markers or suits required: Athletes perform naturally in their training gear.‍
  • Efficient setup and processing: Ideal for busy training environments.
  • ‍High accuracy in real-world settings: Enables ecologically valid assessments.‍
  • Scalable and repeatable: Suitable for both individual assessments and large cohort analysis. 

Theia3D enables researchers and practitioners to analyze and interpret complex multi-joint movements like change of direction with minimal intrusion, providing actionable insights that support both injury prevention and performance optimization.

Future Research Directions

Further research is needed to: 

  • Assess the long-term benefits of repeated COD technique interventions on injury risk and performance.
  • Explore age and skill level adaptation to COD-focused training.
  • Leverage markerless systems like Theia3D to standardize movement assessments across diverse sports settings.

Full Study & Further Reading

Read the full study in Frontiers in Sports and Active Living.

To learn how Theia can support your sports science or performance training programs, contact us or explore our case studies.

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