Functional data analysis of lower-limb joint kinematics during badminton lunges under fatigue

Key Points

• Fatigue led to a change in joint kinematics, enhancing ankle flexibility while making proximal joints stiffer.
• This compensatory response indicates a strategy to maintain performance, but it may increase injury risk, particularly for ACL tears.
• Using functional data analysis, the study assessed joint movements during lunges under fatigue, spotlighting mechanical changes.
• Findings inform training methods aimed at preventing injuries associated with fatigue in athletes.