The purpose of this study is to research the hip ,knee ,ankle flexion muscle group of national team training base of competitive aerobics in China by using BIODEX isokinetic testing instrument .We came to an overall conclusion that compared with a national level athletes ,the international athletes have better hip joint and knee joint muscle’s strength endurance ,explo-sive force and power control and the relative weight of peak torque has no difference ;Ankle joint flexor muscle force control ,extensor explosive force and power control is better .Vertical jump height and peak torque with hip hop number percent leg have high correlation with knee joint time and acceleration time ,percentage of fatigue ,the number of maximum work ,especial under the high speed situation and low relevance with ankle joint ;The indicators have certain relevance between adjacent joints .World-class athletes hip and knee flexion extend strength ra-tio is bigger than the national athletes ,there is no difference for ankle ;among them ,the inter-national athletes knee flexion extend strength ratio is biggest under high speed .%运用BIODEX等速测试仪对我国竞技健美操国家队训练基地男运动员髋、膝、踝关节屈伸肌群及其相关素质进行测试与分析。研究认为，竞技健美操国际级运动员与国家一级运动员相比，髋关节与膝关节肌肉的力量耐力更好，爆发力与力量控制能力更强，而相对体重峰力矩没有差别；踝关节屈肌力量控制能力更好，伸肌爆发力与力量控制能力更好。纵跳高度与髋膝关节峰力矩时间、加速时间有较高相关性，30 s分腿跳次数与髋膝关节肌肉疲劳百分数和最大功次数有较高相关性，其中，高速度情况下呈现非常显著相关性，与踝关节各项指标相关性较低；相邻关节各项指标有一定的相关性。国际级运动员髋关节与膝关节屈伸肌力比国家一级运动员要大，而踝关节没有差别，其中，国际级运动员膝关节高速度下屈伸肌力比最大。
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