摘要
旨在探究青年大学生跑者下肢关节等速肌力与跑步过程中关节刚度的相关性。招募34名男性业余跑者,采用三维动作捕捉系统和测力跑台、等速肌力测试系统测量10和12 km/h跑速下的膝和踝关节刚度;60°/s和180°/s角速度下的膝和踝关节屈伸肌群峰值力矩(peak torque,PT)。使用经过Benjamini-Hochberg法校正后的皮尔逊相关系数分析膝关节等速PT与膝关节刚度;以及踝关节等速PT与踝关节刚度之间的相关性。结果发现:60°/s和180°/s角速度下的膝关节屈肌向心/离心收缩PT与膝关节刚度呈中-高度正相关;60°/s角速度下的踝关节背屈肌离心收缩PT与踝关节刚度呈中-高度正相关;膝关节伸肌和踝关节跖屈肌PT与膝和踝关节刚度均不存在显著相关性。据此,具备更强的膝关节屈肌和离心踝背屈肌力量的业余跑者在跑步过程中表现出更大的膝和踝关节刚度。
This study aimed to investigate the correlation between isokinetic lower-limb joint strength and joint stiffness during running in young college runners.Thirty-four male recreational runners were recruited.The knee/ankle joint stiffness at 10 and 12 km/h,and knee/ankle joint flexors and extensors peak torque(PT)at 60°/s and 180°/s were measured by using a 3D motion capture system and a split-belt instrumented treadmill,and an isokinetic strength test and training system,respectively.Correlations between isokinetic knee joint PT and knee joint stiffness and between isokinetic ankle joint PT and ankle joint stiffness were analyzed using Pearson correlation coefficients corrected by Benjamini-Hochberg.The results are as follows:The knee flexors concentric/eccentric PT at 60°/s and 180°/s were moderately to largely positively correlated with knee joint stiffness;the ankle dorsiflexors eccentric PT at 60°/s was moderately to largely positively correlated with ankle joint stiffness;the knee extensors and ankle plantar flexors PT were not significantly correlated with knee and ankle joint stiffness.Therefore,recreational runners with greater knee flexors and ankle dorsiflexors eccentric strength exhibit greater knee and ankle joint stiffness during running.
作者
张勤
陈诗琴
李斐
ZHANG Qin;CHEN Shiqin;LI Fei(School of Athletic Performance,Shanghai University of Sport,200438 Shanghai,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2023年第3期724-732,共9页
Chinese Journal of Applied Mechanics
基金
上海市青年科技英才杨帆计划资助项目(No.20YF1446500)。
关键词
等速收缩
刚度
跑步经济性
力量训练
isokinetic contraction
stiffness
running economy
strength training
