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相关概念视频

Hydraulic Jump: Problem Solving01:16

Hydraulic Jump: Problem Solving

459
To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
459
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

771
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
771

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相关实验视频

Updated: Jan 12, 2026

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
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下肢协调模式的变化,同时清除连续的障碍.

Flora Panteli1, Apostolos Theodorou2, Athanasia Smirniotou2

  • 1University of Rouen Normandy, CETAPS UR3832, Faculty of Sport Sciences, Rouen, France; National and Kapodistrian University of Athens, School of Physical Education and Sport Sciences, Athens, Greece.

Acta psychologica
|November 7, 2025
PubMed
概括
此摘要是机器生成的。

年轻的障碍者表现出各种协调策略来清除障碍,利用各种运动解决方案和四肢间协调模式. 结合运动变化的训练可以通过鼓励探索替代技术来提高表现.

关键词:
阻碍 阻碍 阻碍 阻碍肢体间的协调协调.可变性的变化.年轻的运动员.

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相关实验视频

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科学领域:

  • 体育运动的生物力学
  • 运动控制和学习.
  • 人类运动分析分析

背景情况:

  • 了解下肢协调在障碍跑中对于性能优化至关重要.
  • 之前的研究已经探索了动力学参数,但对连续障碍的协调变异性却不那么多.

研究的目的:

  • 在连续的障碍清除过程中,在年轻的障碍者中识别出不同的协调配置.
  • 调查协调配置文件与障碍距离的动力学参数之间的关系.
  • 探索运动变异性在年轻运动员运动解决方案中的作用.

主要方法:

  • 视频分析了12名年轻运动员在4个障碍物比赛中进行的比赛.
  • 分析低级行为参数和领先/跟踪腿膝盖角度.
  • 阶层集群分析以确定协调配置文件.

主要成果:

  • 鉴定出了三种不同的阻碍行为协调概况.
  • 运动员在跨越障碍物时表现出一致或可变的四肢间协调.
  • 在个人内部和个人之间观察到协调模式的变化,影响了绩效结果.

结论:

  • 年轻的障碍者采用多种协调策略,暗示利用感知运动系统退化.
  • 运动的变化似乎是维持表现的关键因素.
  • 在训练中纳入运动变异性可能会促进探索各种运动解决方案,以改善障碍.