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相关概念视频

Vector Addition of Forces01:23

Vector Addition of Forces

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When understanding the effects of multiple forces acting on an object, vector addition is a crucial concept to grasp. This mathematical concept can be used to calculate the net force acting on an object when two or more forces are involved.
To understand the concept of vector addition, consider the scenario of a ship being pulled by two small tugboats. The two forces, F1 and F2, act concurrently on the ship in different directions. The parallelogram law can be used to calculate the net force...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
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Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
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相关实验视频

Updated: Jul 5, 2025

Quantitative Static and Dynamic Assessment of Balance Control in Stroke Patients
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通过使用矢量编码和统计参数映射分析,检查动态平衡学习期间的联合协调.

Sungmin Kim1, Feng Qu2, Yi Wang3,4

  • 1Institute of School Physical Education, Korea National University of Education, Cheongju, Chungbuk, Republic of Korea.

Scientific reports
|January 19, 2024
PubMed
概括
此摘要是机器生成的。

学习Y平衡任务改善了新手参与者的动态平衡. 下肢的运动和协调模式发生了显著的变化,增强了伸展距离和稳定性.

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科学领域:

  • 生物力学 生物力学
  • 运动学习是指运动学习.
  • 运动科学 运动科学 运动科学

背景情况:

  • 动态平衡对于日常活动和伤害预防至关重要.
  • Y平衡测试评估功能平衡,并且被广泛使用.
  • 在平衡训练期间了解运动适应对于优化康复和性能至关重要.

研究的目的:

  • 为了研究在Y平衡学习过程中平衡性能,动力学和下肢关节协调的变化.
  • 通过最大触及距离和关节角度分析来确定Y平衡性能的有效性.
  • 探索动力学和协调模式的修改,有助于改善动态平衡.

主要方法:

  • 20名女大学生在五个连续的区块中参与了Y平衡学习任务.
  • 测量包括最大触及距离,峰值关节角度 (部,膝盖,脚) 和关节协调.
  • 统计参数映射被用来分析运动和协调的不同方向 (前面,后侧,后中).

主要成果:

  • 在学习后,后侧和后中侧方向的最大触及距离显著增加.
  • 学习导致了部 (屈曲,绑架,旋转) 和膝关节 (屈曲) 关节角度的显著变化.
  • 关节协调分析揭示了同步的部和膝盖运动以及特定的脚-膝盖策略.

结论:

  • 新手参与者在学习Y平衡任务后表现出更好的动态平衡能力.
  • 下肢运动和协调模式的适应是平衡性能观察到的改善的基础.
  • 研究结果为设计培训计划提供了洞察力,以提高动态平衡并降低不同人群中跌倒风险.