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Changes in knee joint function over a wide range of walking speeds
John P Holden1, Gloria Chou, Steven J Stanhope
1National Institute of Arthritis and Musculoskeletal and Skin Diseases, USA.
Clinical Biomechanics (Bristol, Avon)
|June 21, 2001
Summary
Investigating knee joint mechanics during walking at various speeds reveals distinct patterns. At very slow speeds, healthy individuals exhibit reduced knee flexion and moments, differing from previously reported
Area of Science:
- Biomechanics
- Gait Analysis
- Kinetics
Background:
- Previous studies suggest healthy individuals use increased knee flexor moments at slower walking speeds.
- Understanding gait patterns at slow speeds is crucial for clinical gait analysis.
Purpose of the Study:
- To investigate knee joint rotations, moments, and powers during the stance phase across a broad range of walking speeds.
- To establish normative knee kinetic patterns for very slow walking speeds.
- To differentiate slow-walking effects from pathological gait patterns.
Main Methods:
- Eighteen healthy adults walked at speeds ranging from 25% to 125% of their natural walking speed.
- Knee joint kinematics and kinetics were measured during the stance phase.
- Data were analyzed for rotations, moments, and powers.
Main Results:
- Knee joint kinetic patterns were similar at faster walking speeds.
- At very slow speeds, subjects showed minimal knee flexion and small knee moments through mid-stance.
- Negligible knee joint power was observed in the first 80% of stance at the slowest speeds.
- Most subjects displayed atypical knee moment patterns at slow speeds, unclassifiable as predominantly flexor or extensor.
Conclusions:
- Normative knee joint kinetic data for very slow walking speeds are presented.
- The findings help distinguish between adaptations to slow walking and abnormal gait patterns due to pathology.
- This research provides valuable reference data for clinical gait analysis in patient populations.