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Related Experiment Video

Updated: Jun 24, 2026

Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running

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Experimentally reduced hip abductor function during walking: Implications for knee joint loads.

Marius Henriksen¹, Jens Aaboe, Erik B Simonsen

¹Clinical Motor Function Laboratory, The Parker Institute, Frederiksberg Hospital, Ndr. Fasanvej 57, Frederiksberg, Denmark. marius.henriksen@frh.regionh.dk

Journal of Biomechanics

|April 17, 2009

Summary

This summary is machine-generated.

Reduced gluteus medius (GM) muscle function due to pain surprisingly decreased knee adduction moments during walking in healthy individuals. This challenges the idea that impaired hip abductor function increases knee joint loads.

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Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running

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In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

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Published on: July 2, 2021

Area of Science:

Biomechanics
Musculoskeletal health
Gait analysis

Background:

Hip and knee function are interconnected.
Reduced hip abductor function may contribute to knee osteoarthritis (OA) by increasing knee adduction moments during walking.

Purpose of the Study:

To test if reduced gluteus medius (GM) muscle function increases the external knee adduction moment during level walking in healthy subjects.
To investigate the effect of experimentally induced gluteus medius pain on gait parameters.

Main Methods:

Healthy subjects received intramuscular injections of hypertonic saline to induce short-term gluteus medius pain, with isotonic saline as a control.
Gait analysis, including 3D kinematics and kinetics, and surface electromyography (EMG) of hip and thigh muscles were performed before and after injections.

Main Results:

Gluteus medius (GM) EMG activity was significantly reduced by pain (-39.6%), while other muscles remained unaffected.
Peak frontal plane hip and knee joint moments decreased by -6.4% and -4.2% respectively during pain.
Lateral trunk lean and midstance hip adduction/knee extension angles were reduced, indicating gait adaptations to impaired GM function.

Conclusions:

Experimental reduction of gluteus medius (GM) muscle function via pain significantly decreased the external knee adduction moment during walking.
This finding challenges the prevailing notion that impaired GM function leads to increased knee joint loading.
Gait modifications appear to compensate for reduced GM function, potentially altering knee joint stress patterns.