Abstract:

BACKGROUND: Elite skaters at international level have been shown to hold more rational muscle strength characteristics of joints than the elite skaters at national level. Force indexes are reported to be related to grade, suggesting that the muscle strength characteristics of lower limb joints of skaters are closely related to professional competitive ability.
OBJECTIVE: To study the characteristics of isokinetic muscle strength of lower limb joints in elite female short track speed skaters, so as to provide references for strength training and provide data for revealing sports characteristics.
METHODS: Centripetal isokinetic testing was performed in hip, knee and ankle joints of elite female short trakck speed skaters (numbered as 1, 2, 3 and 4) at international level using Isomed 2000. All skaters underwent thrice subultimate strength adaptive staining before testing, and 2 minutes later, the isokinetic testing was conducted. The angular velocity was set as 60 (°)/s (low velocity) and 180 (°)/s (high velocity), respectively based on preliminary results. The low velocity repeated 5 times and high velocity repeated 7 times, 5 minutes in between. Flexion/extension was a cycle, and the highest values were selected for analysis.
RESULTS AND CONCLUSION: In the high and low velocity speed, all data in ankle and knee had good corresponding relationship, but not hip. Peak torques of ankle and knee joints were on a descent with velocity increasing, and average power increased with velocity increasing. Velocity had impaction on muscle ratio in ankle and knee joints but not hip. Velocity had little impaction on peak torque angle. The flexor and extensor of No.1 skater performed well. The balance between right and left legs of No.1 skater needed to be improved. The ankle strength in No. 3 skater performed well, but the strength of knee and hip needed to be improved. The knee strength of No. 4 performed well, but the speed strength of ankle and hip extensors needed to be improved. In summary, the strength of ankle and knee flexors and extensor in Chinese elite athletes get a well development, but not hip. The elite athletes have higher peak torque, muscle strength ratio shows special features, the balance between right and left knee peak torque, and the peak torque angle is stable, which meet the special requirements. Knee muscle strength in four elite skaters reflects the common characteristics. The hip muscle strength should be improved.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Skating, Muscle Strength, Hip Joint, Knee Joint, Ankle Joint, Tissue Engineering