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首页> 外文期刊>Journal of Biomechanics >Muscle contributions to propulsion and support during running.
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Muscle contributions to propulsion and support during running.

机译：跑步过程中肌肉对推进和支撑的作用。

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Muscles actuate running by developing forces that propel the body forward while supporting the body's weight. To understand how muscles contribute to propulsion (i.e., forward acceleration of the mass center) and support (i.e., upward acceleration of the mass center) during running we developed a three-dimensional muscle-actuated simulation of the running gait cycle. The simulation is driven by 92 musculotendon actuators of the lower extremities and torso and includes the dynamics of arm motion. We analyzed the simulation to determine how each muscle contributed to the acceleration of the body mass center. During the early part of the stance phase, the quadriceps muscle group was the largest contributor to braking (i.e., backward acceleration of the mass center) and support. During the second half of the stance phase, the soleus and gastrocnemius muscles were the greatest contributors to propulsion and support. The arms did not contribute substantially to either propulsion or support, generating less than 1% of the peak mass center acceleration. However, the arms effectively counterbalanced the vertical angular momentum of the lower extremities. Our analysis reveals that the quadriceps and plantarflexors are the major contributors to acceleration of the body mass center during running.
机译：肌肉通过增加力量来推动跑步，这些力量在支撑身体重量的同时向前推动身体。为了了解肌肉在跑步过程中如何促进推进（即质心向前加速）和支撑（即质心向上加速），我们开发了跑步步态周期的三维肌肉驱动模拟。该模拟由92个下肢和躯干的肌腱执行器驱动，并包括手臂运动的动力学。我们分析了模拟以确定每个肌肉如何促进体重中心的加速。在站立阶段的早期，股四头肌群是制动（即重心向后加速）和支撑的最大贡献者。在站立阶段的后半段，比目鱼肌和腓肠肌是推动和支持的最大贡献者。手臂对推动力或支撑力均无明显贡献，产生的质量中心峰值加速度不到峰值的1％。但是，手臂有效地平衡了下肢的垂直角动量。我们的分析表明，股四头肌和足屈肌是跑步过程中身体重心加速的主要因素。

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