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首页> 外文期刊>European journal of sport science: EJSS : official journal of the European College of Sport Science >Relationships between lower-limb kinematics and block phase performance in a cross section of sprinters
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Relationships between lower-limb kinematics and block phase performance in a cross section of sprinters

机译：下肢短跑运动中下肢运动学与阻滞相位性能之间的关系

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This study investigated lower-limb kinematics to explain the techniques used to achieve high levels of sprint start performance. A cross-sectional design was used to examine relationships between specific technique variables and horizontal external power production during the block phase. Video data were collected (200 Hz) at the training sessions of 16 sprinters who ranged in 100 m personal best times from 9.98 to 11.6 s. Each sprinter performed three 30 m sprints and reliable (all intraclass correlation coefficients, ICC(2,3) >= 0.89) lower-limb kinematic data were obtained through manual digitising. The front leg joints extended in a proximal-to-distal pattern for 15 sprinters, and a moderate positive relationship existed between peak front hip angular velocity and block power (r = 0.49, 90% confidence limits = 0.08-0.76). In the rear leg, there was a high positive relationship between relative push duration and block power (r = 0.53, 90% confidence limits = 0.13-0.78). The rear hip appeared to be important; rear hip angle at block exit was highly related to block power (r = 0.60, 90% confidence limits = 0.23-0.82), and there were moderate positive relationships with block power for its range of motion and peak angular velocity (both r = 0.49, 90% confidence limits = 0.08-0.76). As increased block power production was not associated with any negative aspects of technique in the subsequent stance phase, sprinters should be encouraged to maximise extension at both hips during the block phase.
机译：这项研究调查了下肢运动学，以解释用于实现高水平冲刺起步性能的技术。横截面设计用于检查特定技术变量与模块阶段期间水平外部功率产生之间的关系。在16位短跑运动员的训练课上收集了视频数据（200 Hz），个人最佳时间从9.98到11.6 s，范围为100 m。每个短跑运动员进行3次30 m短跑，并通过手动数字化获得可靠的（所有组内相关系数，ICC（2,3）> = 0.89）下肢运动学数据。前腿关节从近端到远端以15个短跑运动员的方式延伸，并且峰值前髋关节角速度和阻滞力之间存在中等正相关关系（r = 0.49，90％置信度= 0.08-0.76）。在后腿中，相对推力持续时间与阻滞力量之间呈高度正相关（r = 0.53，90％置信度= 0.13-0.78）。后臀部似乎很重要。阻滞出口处的后髋关节角度与阻滞力高度相关（r = 0.60，90％置信限度= 0.23-0.82），并且其运动范围和峰值角速度与阻滞力呈中等正相关（r = 0.49） ，则90％的置信度上限= 0.08-0.76）。由于在随后的站立阶段，增加的力量产生与技术的任何负面影响均不相关，因此应鼓励短跑运动员在阻滞阶段最大程度地伸展双髋。

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