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首页> 外文期刊>Medicine and science in sports and exercise >Muscle Stiffness of the Vastus Lateralis in Sprinters and Long-Distance Runners
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Muscle Stiffness of the Vastus Lateralis in Sprinters and Long-Distance Runners

机译：Sprinters和长距离跑步者的覆盖物的肌肉僵硬

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Purpose The stiffness of muscle-tendon units and of tendons in the lower legs plays important roles in sprinting and long-distance running. However, the association of muscle stiffness with sprinting and running remains unknown. This study aimed to identify the characteristics of muscle stiffness in sprinters and long-distance runners, and to determine how muscle stiffness is related to the performance of these athletes. Methods In 22 male sprinters (SPR group), 22 male long-distance runners (LDR group), and 19 healthy untrained control male subjects (CON group), the muscle shear wave speed (a proxy for stiffness) of the vastus lateralis (VL) was measured under passive (resting) and active (contracting the knee extensors at 50% of maximal voluntary contraction) conditions, by using ultrasound shear wave elastography. Results The passive VL shear wave speed in SPR group was significantly lower than that in LDR group (P = 0.039). The active VL shear wave speed in LDR group was significantly higher than that in SPR (P = 0.022) and CON (P < 0.001) groups. In SPR group, the 100-m race time was negatively correlated to the passive VL shear wave speed (r = -0.483, P = 0.023) and positively correlated to the active VL shear wave speed (r = 0.522, P = 0.013). In the LDR group, the 5000-m race time was positively correlated to the passive VL shear wave speed (r = 0.438, P = 0.047) but not to the active VL shear wave speed. Conclusion The muscles of sprinters and long-distance runners exhibit characteristic stiffness that can be beneficial to their athletic performance. Passive and active muscle stiffness may play different roles in human locomotion, depending on locomotion speeds.
机译：目的，肌腱单元的刚度和较低腿中的肌腱在短跑和长距离运行中起重要作用。然而，肌肉刚度与短跑和跑步的关联仍然未知。本研究旨在识别短跑运动员和长距离跑步器中肌僵硬度的特征，并确定肌肉刚度如何与这些运动员的性能有关。方法在22例雄性短跑运动员（SCH组），22例男性长距离跑步器（LDR组）和19个健康未受训练的控制男性受试者（CON组），肌肉剪切波速（刚度的代理）（VL通过使用超声剪切波弹性显影，在被动（休息）和活性（在最大自愿收缩的50％处收缩膝关节延伸部）测量。结果SCR组中的无源VL剪力波速度明显低于LDR组（P = 0.039）。 LDR组中的活性VL剪力波速显着高于SPR（P = 0.022）和CON（P <0.001）组。在SPR组中，100 m匹配时间与无源VL剪切波速（R = -0.483，P = 0.023）负相关，并与活性VL剪切波速度呈正相关（r = 0.522，p = 0.013）。在LDR组中，5000-M匹配时间与无源VL剪力波速度呈正相关（r = 0.438，p = 0.047），但不是无效VL剪切波速度。结论短跑运动员和长距离跑步者的肌肉表现出具有对运动性能有益的特征僵硬。根据运动速度，被动和活跃的肌肉僵硬可能在人类运动中发挥不同的角色。

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