Trunk And Lower Limber Muscle Strength Characteristics Of National Elite Females Freestyle Skiing Aerials Athletes And Discuss With The Relations Of Balance Ability

6 national elite female freestyle skiing aerials athletes were selected as the research object.This article apply ISOMED2000 isokinetic test system for athletes trunk,hip,knee at the different speeds of isokinetic test,it can test maximum joint torque,angle of maximum joint torque,unit weight maximum torque,rate of flexible maximum torque and extend maximum torque,total work,total power,average power,range movement and so on,which analyze athletes level and characteristic of muscle strength of trunk and lower limb. Apply Finland METIUR balance test system to test body balance ablity,it can test moving distance of body gravity center of left and right,before and after,up and down and velocity torque and so on.which conduct a preliminary assessment for athletes balance ability.Apply statistical software SPSS16.0 for athletes exprimental data to statistice,and data were analyzed by using T test and analysing multi-factor correlation,for discussing athletes balance ability relation with muscle strength of trunk and lower limb.The finding indicate that:1 muslce strength charcteristic of female freestyle skiing aerials athletes:trunk extension strength is about 1.7 times as flexion strength. right Hip strength of flexion and extension were better than the left. Because athletes have advantage of right leg , to allocate more muscle strength to right leg in the sport.The right knee extension strength was better than left extension strength;left flexion strength was better than right flexion strength. Possibly because of taking unsynchronous training ways to the same name muscle of left and right at the same time.2 Trunk muscle strength characteristic relation with balance ability of national elite female freestyle skiing aerials athletes: there is a signficant correlationship in athletes body balance ability with trunk unit weight maximum flexion strength,right unit weight maximum reversal strength.3 Lower limb strength characteristic relation with balance ability of national elite females freestyle skiing aerials athletes : there is a significant correlationship in athletes body balance ability with left and right hip extension maximum strength of unit weight. there is a significant corrlationship in athletes body balance ability with right knee maximum strength of unit weight.The finding suggests:1 Athletes should pay attention to reasonable control body weight and the balanced train muscle strength in usual training.2 In the situation of moderate increasing movement velocity strengthen strength training of trunk and lower limb.2 It suggest that ahtletes appropriate control of hip joint range of movement and improve left hip muscle strength of flexion and extension. Modest strengthen training of right knee flexion strength and left extension strength. 3 It suggest that moderate improve trunk maximum flexion muscle strength and right trunk maximum reversal strength to increase body balance ability.4 Appropriate improve left and right hip unit weight maximum extension strength and right knee unit weight maximum flexion strength to increase athletes body balance ability.