Abe T, Kawakami Y, Ikegawa S, Kanehisa H, Fukunaga T
Department of Sports Sciences, College of Arts and Sciences, University of Tokyo, Japan.
J Sports Med Phys Fitness. 1992 Dec;32(4):353-7.
Isometric and isokinetic (concentric and eccentric, strength of alpine skiers with different performance levels were measured. Nine national (elite, EG) and 10 collegiate (trained, TG) female alpine skiers (16 to 23 years of age) performed maximal voluntary knee extension and flexion. Peak torque was measured at an angular velocity of 30 deg.s-1. The cross-sectional area (CSA) of thigh muscles (quadriceps and hamstring muscles) was determined by an ultrasonic method. No significant differences in anthropometric variables and CSA were observed between EG and TG. EG had significantly greater (p < 0.01 for extensors and p < 0.05 for flexors) eccentric knee extensor and flexor strength than that of TG whereas no significant differences were noted in isometric and concentric strength. Eccentric strength/CSA ratio was also higher for EG than for TG. It was suggested that knee extension and flexion strength during eccentric muscle action might be related to the performance level of alpine skiers.
对不同表现水平的高山滑雪运动员进行了等长和等速（向心和离心）力量测试。九名国家（精英，EG）和十名大学（训练有素，TG）女子高山滑雪运动员（16至23岁）进行了最大自主膝关节伸展和屈曲。在30度·秒-1的角速度下测量峰值扭矩。通过超声方法测定大腿肌肉（股四头肌和腘绳肌）的横截面积（CSA）。EG组和TG组在人体测量变量和CSA方面未观察到显著差异。EG组的离心膝关节伸肌和屈肌力量显著大于TG组（伸肌p < 0.01，屈肌p < 0.05），而等长和向心力量未观察到显著差异。EG组的离心力量/CSA比值也高于TG组。研究表明，离心肌肉动作期间的膝关节伸展和屈曲力量可能与高山滑雪运动员的表现水平有关。
