การวิเคราะห์แรงปฏิกิริยาข้อสะโพกในกิจกรรมประจำวันโดยใช้แบบจำลองระบบกล้ามเนื้อและกระดูก

Abstract

Hip Contact Force (HCF) is a key parameter in movement biomechanics and is widely used to evaluate mechanical loading on the hip joint. However, in vivo measurement of HCF is limited because it is an invasive procedure and can only be performed in specific patient populations. Therefore, musculoskeletal modeling has become an important approach for estimating hip joint forces in healthy individuals. The aim of this study was to analyze the magnitude and direction of HCF in six healthy subjects during seven activities of daily living using the Gait2392 musculoskeletal model implemented in OpenSim 4.5. The validity of the model was evaluated by comparison with the OrthoLoad reference database. The results showed that the force patterns and the timing of peak forces were highly consistent with the reference data, particularly the characteristic double-peaked pattern observed during walking. Peak HCF was highest during fast walking (420.31 ± 14.79 %BW), followed by load-carrying walking (410.31 ± 14.44 %BW), whereas the sit-to-stand activity exhibited the lowest HCF (196.41 ± 17.03 %BW). In addition, walking speed significantly affected HCF magnitude (P < 0.01). The axial component along the femoral shaft was identified as the dominant force component across all activities. In conclusion, musculoskeletal modeling combined with motion data provides reliable estimates of HCF. The findings of this study may serve as reference data for biomechanical research and future comparisons with patient populations."