对反运动跳跃性能进行动力学分析,以应对即时的神经肌肉电刺激
Chao-Fu Chen1, Shu-Fan Wang1, Xing-Xing Shen1
1Physical Education College, Huaibei Normal University, Huaibei 235000, China.
Mathematical biosciences and engineering : MBE
|November 3, 2023
概括
神经肌肉电刺激 (NMES) 训练通过增加神经肌肉激活和激活后强化来提高反运动跳跃 (CMJ) 高度. 这种增强也会影响跳跃过程中的关键动力学变量.
科学领域:
- 运动科学 运动科学 运动科学
- 生物力学 生物力学
- 神经肌肉生理学 神经肌肉生理学
背景情况:
- 了解神经肌肉电刺激 (NMES) 对爆炸性运动运动的急性影响,对于提高表现至关重要.
- 激活后增强 (PAP) 是一种现象,前面的肌肉收缩增强了随后的肌肉力量产生.
- 反运动跳跃 (CMJ) 是一种广泛使用的低体爆炸力测量方法.
研究的目的:
- 研究神经肌肉电刺激 (NMES) 训练对反运动跳跃 (CMJ) 高度的直接影响.
- 分析NMES干预后CMJ期间的动力学差异.
主要方法:
- 15名没有电刺激经验的男学生参与了这项研究.
- 参与者在30分钟的NMES会话之前和之后立即进行最大努力CMJ.
- 一个高速摄像头系统捕获了动力学数据,用于详细分析.
主要成果:
- 立即的NMES训练导致CMJ高度增加,这归因于神经肌肉激活和激活后的强化.
- 在关节角速度,大腿和腿部速度/加速以及脚底速度中观察到显著的变化.
- NMES对CMJ的生物机械执行产生了急性影响.
结论:
- NMES可以成为一种有价值的工具,用于急性增强爆炸力,正如改善CMJ性能所证明的那样.
- 这些发现表明,NMES诱导的强化会影响跳跃性能关键的多个动力学参数.
- 建议将NMES整合到训练方案中,并与技术和身体调节一起,以促进未来的运动发展.
相关概念视频
01:20Motor Unit Stimulation
1.6K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
1.6K
01:22Muscle Stimulation Frequency
2.3K
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...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
2.3K
01:31Action Potential
8.0K
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
8.0K
01:24Generation of Action Potential in Skeletal Muscles
4.6K
Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the...
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the...
4.6K