〔目的〕歩行速度や前足部の部位の違いによって，足指骨や中足骨の床を押す力ベクトルの違いを示すことを目的とした．〔対象と方法〕健常男性8名を対象とした．歩行速度は3条件（自然歩行，速い歩行，遅い歩行）とした．右末節骨底（母指，中指，小指）と中足骨頭（第1，第5）の床押力ベクトルを計測した．〔結果〕速度によらず足底の外側から内側の順にピークを迎えた．中足骨頭と母指末節骨底は各々右後方と右前方へ押した．速い歩行時に内側への荷重が増加した．〔結語〕立脚後期から前遊脚期において，主に母指基節骨底や中足骨頭の床押力ベクトルが強くなり，速度を変えても母指基節骨底や中足骨頭が床を押す力が強いことが示唆された．

The closed kinetic chain is an essential movement method for humans in daily life, and is also important as a training method. However, there have been few studies focusing on the hip adductor muscles. We used electromyography to measure the muscle activity of the hip adductor muscles during walking and standing movements as part of daily living activities, as well as bicycle ergometer exercise and squats. Concerning the role of the adductor muscles, they are thought to stabilize the pelvis during the unilateral support phase when walking, and to act as hip extension and hip alignment adjustment during cycle ergometer exercise. By using electromyography and inertial sensors, the results of this study showed that wearable technologies can be used to quantify neuromuscular function during closed kinetic chain movements. The results serve as a reference for the development of rehabilitation devices, assistive technologies, and computational models that need the simulation of hip joint mechanics. Linking muscle activity data to engineering-based strategies enables precise musculoskeletal assessment and intervention beyond biological observation.