跑步年限不同，节段协调性的可变性也不同。
Segment Coordination Variability Differs by Years of Running Experience.
机构信息
Michigan Performance Research Laboratory, School of Kinesiology, Ann Arbor, MI.
Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI.
出版信息
Med Sci Sports Exerc. 2019 Jul;51(7):1438-1443. doi: 10.1249/MSS.0000000000001913.
UNLABELLED
Running is a popular activity that results in high rates of overuse injury, with less-experienced runners becoming injured at higher rates than their more-experienced peers. Although measures of joint kinematics and kinetics and ground reaction forces have been associated with overuse running injuries, similar differences across levels of running experience have not been found. Because running is a motor skill that may develop with experience, an analysis of segment coordination and its variability could provide additional insight into why injury incidence decreases with increasing experience.
PURPOSE
The purpose of this study was to determine if less-experienced runners have different segment coordination and lower segment coordination variability compared with their more-experienced peers.
METHODS
This retrospective analysis included 20 more-experienced (≥10 yr running) and 21 less-experienced (≤2 yr running) runners. Sagittal thigh versus shank and shank versus foot segment coordination and coordination variability were calculated using a modified vector coding approach as individuals ran on a treadmill at preferred pace. Coordination and its variability were compared between groups during terminal swing and early, mid, and late stance for both segment couples.
RESULTS
Segment coordination was similar between less- and more-experienced runners. Less-experienced runners had lower segment coordination variability compared with more-experienced runners for both the thigh versus shank and shank versus foot couples. This lower variability occurred during early and mid stance.
CONCLUSIONS
Runners appeared to attain stable segment coordination patterns within 2 yr of consistent running, but had lower coordination variability compared with individuals who had been running for 10 or more years. These results suggest that assessment of movement patterns and their flexibility may help inform injury prevention or treatment strategies for less-experienced runners.
目的
本研究旨在确定与经验丰富的跑者相比，经验较少的跑者是否具有不同的节段协调性和更低的节段协调性变异性。
方法
本回顾性分析纳入了 20 名经验更丰富（跑步时间≥10 年）和 21 名经验较少（跑步时间≤2 年）的跑者。在跑步机上以个人的习惯速度跑步时，使用改良的向量编码方法计算矢状面大腿相对于小腿和小腿相对于脚的节段协调性以及协调性变异性。在终末摆动期以及早期、中期和后期支撑期，比较两组节段对之间的协调性及其变异性。
结果
经验较少和经验丰富的跑者之间的节段协调性相似。与经验丰富的跑者相比，经验较少的跑者的大腿相对于小腿和小腿相对于脚节段的协调性变异性更低。这种较低的变异性发生在早期和中期支撑期。
结论
在持续跑步 2 年内，跑者似乎已经达到了稳定的节段协调模式，但与跑步 10 年或更长时间的个体相比，他们的协调性变异性较低。这些结果表明，评估运动模式及其灵活性可能有助于为经验较少的跑者提供预防或治疗策略。
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