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Rehabilitation Practice and Science

Translated Title

髖關節角度改變對等長及等速運動中膝屈伸肌之影響

Abstract

In order to study the effects of hip and knee angle to knee flexion and extension torque and other measurements obtained from Cybex 340 isokinetic dynamometer in isometric and isokinetic exercises, twenty normal young adults were tested at various hip position(SITTING:hip 85°,SEMIRECLINED:hip 135°, SUPINE: hip 180°) and different speeds (ISOMETRIC:0° /sec, LOW SPEED ISOKINETIC:60°/sec, HIGH SPEED ISOKINETIC:180°/sec). Adequate warm-up exercise and rest was requested between each test in this study.In isometric flexion exercises, the greatest torque value was obtained at supine position. The torque value was decreasing as knee flexion angle increasing. In isometric extension exercises, there was no significant change of touque generation in different hip position. The greatest torque value was obtained at knee flexion 60°, dereasing in order as 90°,30°,0° The effects of hip position on torque generating were rather similar in isometric and isokinetic tests, either in flexion or extension, but the effect became not so significant as the speed garadually increasing. In study of the effect of hip and knee position on peak torque(PT),average power(AVP),total work(TW) in isokinetic tests, the results were as following: (1) No matter the data was corrected by individual body weight or not, the stastistic significance was the same.(2) In low speed, the greatest H/Q ratio of PT,AVP,and TW were obtained at semireclined position.(3) In high speed hip position showed no significant effect on the H/Q ratio of PT,AVP, and TW.(4) All H/G ratios at various positions and different speeds were within 0.5-0.7. (5) AVP (TW/time) was found higher in high speed because the time span was shorter in high speed ecercise.

Language

Traditional Chinese

First Page

60

Last Page

67

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