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April 1, 2026BioengineeringOpen Access

Relationship Between Quadriceps Muscle Strength Asymmetry and Lower Limb Biomechanical Asymmetry During Running in Patients Who Underwent Anterior Cruciate Ligament Reconstruction

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Investigates how quadriceps strength asymmetry affects running biomechanics in ACLR patients, suggesting critical rehabilitation insights.

This study aims to explore the relationship between quadriceps muscle strength asymmetry and lower limb biomechanics during running in patients post-ACLR.
Collected isokinetic quadriceps strength and running kinematic and kinetic data from 39 ACLR individuals.
Utilized paired t-tests for bilateral differences and Pearson correlation analysis for associations.
Assessed different angular velocities (60°/s, 180°/s) in strength measurements.
The injured leg exhibited significantly weaker quadriceps strength at all tested speeds (p < 0.05).
Significant biomechanical differences were observed: greater hip flexion and reduced knee flexion in the injured leg at key points during the running cycle (p < 0.05).
Moderate negative correlations were found between quadriceps strength and knee flexion angles as well as knee flexion moments at specific ground reaction force points (p < 0.05).

Ge et al. (2026) studied this question.

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Investigates how quadriceps strength asymmetry affects running biomechanics in ACLR patients, suggesting critical rehabilitation insights.