BACKGROUND:Isokinetic test system has been widely used to evaluate the muscle function levels Whereas.the reports concerning effect of sport training on the development of muscle strength of hip joint in college students using isokinetic testing are few.OBJECTIVE:To assess the extensor and flexor muscle strength of hip joints in college students with isokinetic testing system METHODS:Totally 40 volunteers,including 20 male and 20 female students were selected.Kinitech isokinetic testing system,produced by Australian Kylingk Company,was used to test the flexion and extension muscle of hip ioints as the sequence of centripetal followed by centrifugal.The test speed was 60(°)/s as slow speed,180(°)/a as middle speed,240(°)/s as high speed.Peak torque(PT)and relative values of extension and flexion muscles,total power(TP)and relative total power were measured.RESULTS AND CONCLUSION:At the respective speed,PT and relative values of female students were greater than that of female students(P＜0.01).Atthe speed of 60,120 and 240(°)/s,flexor PT was smaller than that of extensor PT in male students,which was opposite in the female students,but the difference had no significance(P＞0 05).At the respective speed.TP of males were greater than that of female students(P＜0.01).In male students,TP and relative values of flexor were smaller than extensorat speed of 60(°)/s and 120(°)/s(P＜0.01),and had difference at speed of 240(°)/s(P＜0.05).Infemale students,TP and relative values had significant difference between flexor and extensor at speed of 60(°)/s(P＜0 01)and at speed of 120(°)/sand 240(°)/s(P＜0 05).At the respective speed,PT and relative values,TP and relative values in male students are all greater than females.These values decrease with the speed increasing.At the respective values,values of male students are bigger than females.

0.05),while there were significant differences at speed of 240?/s(P