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相关概念视频

Social Facilitation01:04

Social Facilitation

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Not all intergroup interactions lead to negative outcomes. Sometimes, being in a group situation can improve performance. Social facilitation occurs when an individual performs better when an audience is watching than when the individual performs the behavior alone. This typically occurs when people are performing a task for which they are skilled.
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Exercise and Muscle Performance01:27

Exercise and Muscle Performance

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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相关实验视频

Updated: Jan 15, 2026

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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外部注意力焦点通过调节肌肉动力学来提高站立长跳的性能,与内部注意力焦点相比.

Xinxin Liu1, Jian Chen1,2, Zhengye Pan3

  • 1School of Health Science, Wuhan Sports University, Wuhan, HUB, China.

Motor control
|October 9, 2025
PubMed
概括

外部焦点 (EF) 训练通过提高肌肉力量生产和效率来提高站立远跳的性能. 这种策略优化了机械,导致更长的跳跃距离.

关键词:
专注的注意力,注意力的战略.生物力学 生物力学下肢生物力学下肢生物力学发动机的性能 发动机的性能神经肌肉激活活动

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Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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科学领域:

  • 生物力学 生物力学
  • 运动科学 运动科学 运动科学
  • 发动机控制器的控制器

背景情况:

  • 在体育训练中,注意力集中策略至关重要.
  • 外部聚焦 (EF) 提高了站立远跳 (SLJ) 的表现.
  • 在SLJ中 EF益处背后的肌肉动力学尚不清楚.

研究的目的:

  • 调查EF在SLJ期间对肌肉动态的影响.
  • 为了将EF与内部焦点 (IF) 和控制条件进行比较.

主要方法:

  • 12名健康的男性在EF,IF和对照条件下使用拉丁方形设计在EF,IF和对照条件下进行SLJ.
  • 在起飞阶段记录了动力学和动态数据.
  • 逆动力学分析用于计算关节和肌肉力量.

主要成果:

  • 与IF和控制相比,EF导致跳跃距离更长,投射角度更低,峰值水平速度和冲动更高.
  • 在异常肌肉动作过程中,EF增加了质量位移中心,并在同心动作过程中减少了它.
  • 肌肉力量的峰值和力量发展的速度在巨大的侧面,巨大的中间,巨大的中间,和部最大的力量在EF下更高.

结论:

  • EF策略通过提高异常肌肉收缩效率来增强SLJ机制.
  • 这导致储存的弹性潜在能量增加,促进同心力产生.
  • 这些发现表明,EF优化肌肉功能,以提高跳跃性能.