'Whip from the hip': thigh angular motion, ground contact mechanics, and running speed.
'Whip from the hip': thigh angular motion, ground contact mechanics, and running speed.
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DOI：
10.1242/bio.053546
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发表时间：
2020-10-21
期刊：
影响因子：
2.4
通讯作者：
Stearne DJ
中科院分区：
文献类型：
--
作者：
Clark KP;Meng CR;Stearne DJ
在高速奔跑中，下肢着地时的垂直速度被认为是产生巨大垂直力所需的关键因素。此外，更大的腿部角速度也与更快的跑步速度相关。然而，这些因素之间的联系还没有在更快的跑步速度中得到全面的调查。因此，本研究旨在评估跑步速度，大腿角运动和垂直力决定因素之间的关系。假设大腿角速度与跑步速度和着地时下肢垂直速度均呈线性正相关。来自不同运动背景的40名受试者（20名男性，20名女性）在一次测试中自愿完成了40米跑步试验，测试范围为次最大和最大跑步速度。线性和角运动学数据从31-39米收集。结果支持假设，因为在所有受试者和试验中（速度范围：3.1-10.0 m s - 1），大腿角速度的测量显示出与速度（所有R2= 0.70， P<0.0001）和着陆时下肢垂直速度（所有R2=0.75， P<0.001）有很强的正线性相关。这些发现表明，大腿角速度与跑步速度密切相关，下肢冲击运动学与垂直力的施加有关。摘要：本研究考察了跑步速度、大腿运动和垂直力的决定因素。结果表明，大腿角速度与速度和下肢冲击运动学相关。
During high-speed running, lower limb vertical velocity at touchdown has been cited as a critical factor needed to generate large vertical forces. Additionally, greater leg angular velocity has also been correlated with increased running speeds. However, the association between these factors has not been comprehensively investigated across faster running speeds. Therefore, this investigation aimed to evaluate the relationship between running speed, thigh angular motion and vertical force determinants. It was hypothesized that thigh angular velocity would demonstrate a positive linear relationship with both running speed and lower limb vertical velocity at touchdown. A total of 40 subjects (20 males, 20 females) from various athletic backgrounds volunteered and completed 40 m running trials across a range of sub-maximal and maximal running speeds during one test session. Linear and angular kinematic data were collected from 31–39 m. The results supported the hypotheses, as across all subjects and trials (range of speeds: 3.1–10.0 m s−1), measures of thigh angular velocity demonstrated a strong positive linear correlation to speed (all R2>0.70, P<0.0001) and lower limb vertical velocity at touchdown (all R2=0.75, P<0.001). These findings suggest thigh angular velocity is strongly related to running speed and lower limb impact kinematics associated with vertical force application. Summary: This investigation examined running speed, thigh motion and vertical force determinants. Results suggest thigh angular velocity is strongly correlated to speed and the lower limb impact kinematics underlying force application.