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Updated: Jul 30, 2026

Movement Retraining using Real-time Feedback of Performance
Published on: January 17, 2013
Enhancing assessment of intensive change of direction: minimal models for pelvis movements during approach and exit
Maede Alavikia1, Ahmad Reza Arshi1
1Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.
Abstract:
This study presents a minimum instrumentation methodology to assist sports biomechanics and coaching teams in improving the performance of individual athletes during the change of direction (COD) manoeuvre. A procedure is introduced to identify the deceleration and re-acceleration phases and evaluate the athlete's control velocity and stability maintenance. This is achieved by adopting a minimal limit cycle model to study sacrum kinematics. The methodology raises the coach's understanding of the athlete deficiencies and gain insight into how the nonlinearity of the pelvis movement could be considered a measure of skill level.
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