조깅시 착지 유형과 시간에 따른 지면 반력 분석

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate how ground reaction force changed according to both time and striking patterns. Subjects for this study were four university students in their early twenties. Two of the women jogged with a heel-strike pattern, while the other two jogged with a toe-strike pattern. Independent variables for this study were jogging time and striking pattern. Jogging time was divided into six stages over the duration of one hour. Striking patterns were divided into two types: heel-strike, and toe-strike. Dependent variables were consisted of impact force and active force in both vertical and anterior / posterior planes. The categories for these forces were: loading rate of impact force, loading rate of active force, number of impact peaks, contact time (vertical ground reaction force only), impulse, peak values, braking time and propulsive time, interval time between first heel (or toe) strike to first passive peak, and interval time between first heel (or toe) strike and first active peak. This study utilized the Kistler type 9281B Force Platform to measure dependent variables.Toe-strikers showed more efficient jogging patterns. They experienced significantly less impact force than heel strikers, and they were able to generate more impulse in a shorter time period. For toe-strikers, some of these results quickly deteriorated after thirty minutes. However, their levels were still below that of heel strikers despite decreased efficiency.Toe-strikers and heel-strikers did not show the effects of active force fatigue even after one hour. In the future, if researchers wish to understand the effects of fatigue, the test duration should be longer than one hour.

참고문헌 (Reference)

1 "격의 수도 적어 더 바람직한 착지 유형이라는 결론을 내리게 되었다 그러나 조깅 시간 60분에는 힘 부하율 역적이 감소하지 않아 조깅시 피로의 역학적 분석을 위해서는 60분 이상 실험시간을 갖는 것이 필요하다"

2 "University of Calgary" 11-23,

3 "Response of joints to impact loading relationship between trabecullar microfractures and cartilage degeneration Journal of Biomechanic" 51-57, 1973

4 "Jogging시 발의 착지 유형에 따른 지면반력의 변화" 1993

5 "Ground reaction forces in running Journal of Biomechanic" 147-155, 1987

6 "Ground reaction forces in distance running Journal of Biomechanic" 397-406, 1980

7 "External force measurements with sports shoes and playing surfaces In Biomechanical Aspects of Sports Shoes and" 1983

8 "Effect of prolonged walking on concrete on the joint of sheep" 1980

9 "Biomechanical aspects of running In Biomechanics of Runnig Shoes" 1986