Correlation between Lower Extremities Joint Moment and Joint Angle According to the Different Walking Speeds

보행 속도에 따른 하지 관절의 각도와 모멘트의 상관관계

  • Published : 2008.06.30


The purpose of this study was to evaluate the correlation between joint moment and joint position angle according to the different walking speeds. According to the different walking speeds(1.5m/s, 1.8m/s, 2.1m/s), experiments were terminated by 8 male subjects. In conclusion, 1. The peak extensor moment of knee joint increased by increasing walking speed, however, walking speed didn't have an effect on peak flexor and abductor moment of knee joint. 2. The position angle of knee joint increased movement of flexion, but other position angles of knee joint didn't have difference when the peak extensor moment generated. 3. The peak joint moment of hip significantly increased in extension, flexion and abduction by increased walking speed. 4. The hip position angle showed more flexible at the hip peak flexor/extensor moment generated. 5. The co-ordination pattern between peak knee joint moment and knee position angle were mathematically modeled by using a least square method. We could get the high level value of R2. We expect to apply this results for evaluating the physical faculty of knee joint.

본 연구의 목적은 보행 속도의 차이에 따른 최대 관절 모멘트와 최대 모멘트 발생 시점의 관절 각도 상관관계를 규명하는데 있다. 8명의 $20{\sim}30$대 남성을 대상으로 보행 속도의 3가지 단계(1.5m/s, 1.8m/s, 2.1m/s)를 나누어 속도에 따른 보행을 실시하여 얻어진 결론은 다음과 같다. 1. 보행 속도가 증가함에 따라 무릎 최대 신전 모멘트는 증가하였고, 굴곡, 외전 모멘트는 큰 영향을 받지 않았다. 2. 최대 신전 모멘트가 발생하는 시점의 무릎 관절 각도는 굴곡의 움직임이 커졌으나, 다른 무릎 관절 각도에는 변화가 없었다. 3. 힙 최대 신전, 굴곡, 외전 모멘트는 증가하였다. 4. 최대 굴곡과 신전 모멘트가 발생하는 시점의 힙 관절 각도의 신전과 굴곡의 증가 현상을 보였으나, 최대 외전 모멘트가 발생하는 시점의 무릎 관절 각도에는 변화가 없었다. 5. 무릎 최대 신전, 굴곡, 외전 모멘트와 무릎 관절 각도를 least square method를 이용하여 적합도 검사를 실시한 결과 R2값이 높게 나타나 상관관계의 설명력이 높았다. 이렇게 근사된 곡선의 근사식은 보행 속도에 따른 무릎 관절의 평가 자료로 이용될 것으로 기대된다.


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