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Computer-based estimation of the hip joint reaction force and hip flexion angle in three different sitting
J Van Houcke1, A Schouten2, G Steenackers2
1Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium.
Applied Ergonomics
|May 16, 2017
Summary
The kneeling chair significantly reduces hip joint reaction force (HJRF) and flexion angle compared to simple and car seats. This ergonomic sitting configuration offers potential benefits for hip joint health.
Area of Science:
- Biomechanics
- Ergonomics
- Musculoskeletal modeling
Background:
- Sitting is a common daily activity with various configurations.
- The effects of different sitting postures on hip joint loading remain understudied.
Purpose of the Study:
- To evaluate hip joint reaction force (HJRF) and hip flexion angle across three distinct sitting configurations.
- To compare the ergonomic implications of simple chairs, car seats, and kneeling chairs on the hip joint.
Main Methods:
- Utilized musculoskeletal modeling to simulate hip joint loading in a virtual population.
- Analyzed HJRF (as % body weight) and hip flexion angles for each sitting configuration.
Main Results:
- Kneeling chairs showed a significant reduction in HJRF (8.7%BW) and hip flexion angle (50°).
- Compared to car seats (79°), kneeling chairs (-29°) and simple chairs (-16°) had lower hip flexion angles, avoiding femoroacetabular conflict thresholds.
- Kneeling chairs demonstrated over a 50% relative reduction in HJRF.
Conclusions:
- The kneeling chair configuration presents the most ergonomic option for hip joint health.
- Reduced hip joint loading and favorable flexion angles suggest benefits for prolonged sitting.
- Further research into ergonomic seating solutions is warranted to mitigate hip joint strain.
