힘의 작용점(CoP)에 대한 발목관절 내, 외번 예측 변수로의 가능성 연구
Predictive Factors for Inversion and Eversion of the Ankle based on the Area of Center of Pressure (CoP) Trajectories during Walking
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[목적] 본 연구는 보행 속도 변화에 따른 압력중심(CoP) 궤적의 면적이 발목관절의 내·외번 움직임에 미치는 영향을 분석하 고, 발목 불안정성을 예측할 수 있는 변수인지를 조사하는 데 그 목적이 있다. [방법] 정형외과적 병력이 없는 20대 성인 남성 27명을 대상으로 느린 보행, 정상 보행, 빠른 보행의 세 가지 속도로 트레 드밀에서 보행 실험을 실시하였다. 보행 중 수집된 CoP 궤적의 누적 면적과 발목관절의 내·외번각을 비교 분석하였으며, 가장 차이를 보인 QA 영역의 영향력을 평가하였다. [결과] 느린 보행 시 좌우 CoP 범위(p <.05)와 3사분면 누적 면적(p <.05)이 정상 및 빠른 보행에 비해 유의하게 증가하였으 며, 발목관절의 내·외번각(p <.05)과 가동범위(p <.05)도 함께 증가하였다. 또한, 3사분면의 CoP 누적 면적은 발목관절의 최대외번각(p =.001)과 외번각속도(p =.005)에 유의한 부적 영향을 미치는 것으로 나타났다. [결론] 본 연구는 CoP 궤적의 누적 면적, 특히 3사분면 영역이 발목관절의 외번 동작을 예측하는 중요한 요인임을 밝혀냈 다. 이러한 결과는 발목 불안정성 평가 및 예방, 신발 개발과 재활 프로그램에 유용하게 활용될 수 있을 것으로 사료 된다.
Abstract
PURPOSE This study analyzed the relationship between the center of pressure (CoP) trajectory area and ankle inversion/eversion movement across different walking speeds and established a new assessment method for predicting ankle instability. METHODS Twenty-seven healthy young adult males (20 yrs) performed treadmill walking trials at three speeds (slow, normal, and fast). Their cumulative CoP trajectory area and ankle inversion/eversion angles were analyzed, with particular focus on the third quadrant area (3QA). RESULTS During slow walking, mediolateral CoP range (p < .05) and 3QA (p < .05) increased significantly compared to normal and fast walking. Concurrently, ankle inversion/eversion angle (p < .05) and range of motion (p < .05) also increased. Furthermore, 3QA exhibited significant negative correlations with maximum ankle eversion angle (p = .001) and eversion angular velocity (p = .005). CONCLUSIONS This study provides findings that the CoP trajectory’s cumulative area, specifically 3QA, serves as a critical predictor of ankle joint eversion kinematics. These findings have potential implications for ankle instability assessment, prevention, footwear design, and rehabilitation protocols.
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