Journal of Ergonomics
Open Access

Takuma Inai

Publications

• Research Article
  Relationship between Hip Flexion Contracture and Hip-Joint Contact Force in Standing Posture: A Computer Simulation Study
  Author(s): Takuma Inai, Mutsuaki Edama, Tomoya Takabayashi and Masayoshi KuboTakuma Inai, Mutsuaki Edama, Tomoya Takabayashi and Masayoshi Kubo
  
  Mechanical stress on articular cartilage and long-duration standing postures are risk factors for hip osteoarthritis progression. This study aims to examine the relationship between hip flexion contracture and the hip-joint contact force in standing postures using computer simulation. A musculoskeletal model composed of seven segments (Head, Arms, and Trunk (HAT) and thighs, shanks, and two feet) was created. Various standing postures (708 variations) were generated, and five hip flexion contracture conditions were set: zero contracture and flexions of 0°, 10°, 20°, and 30°. A standing posture satisfying the hip flexion contracture condition with the minimum sum of the muscle activations was obtained as the optimal standing posture, and the hip-joint contact force in the optimal standing posture was calculated. A sensitivity analysis was conducted by varying four param.. View More»
  DOI: 10.4172/2165-7556.1000194

  Abstract PDF

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