用EMG重新考虑运动选择:用关节EMG排名部练习和肌肉力量练习之间的差异一致
Medicine and science in sports and exercise
|April 23, 2025
概括
按部肌肉力量排名部炼不同于使用表面电肌图 (EMG). 电磁图谱对于类似运动的个人内部比较最有用,而不是用于整体运动选择.
科学领域:
- 生物力学 生物力学
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
背景情况:
- 表面电肌图 (EMG) 被广泛用于在伤害预防和康复中进行运动选择.
- 仅仅肌肉激活对适应的关键不如机械紧张.
- 关节肌肉力量是部集中炼的关键因素.
研究的目的:
- 为了比较基于关表面EMG大小与估计的肌肉力量的运动排名.
- 调查选择部专注于训练和康复的部运动所产生的影响.
主要方法:
- 14名女足球运动员进行了8次部炼.
- 记录了全身动力学,地面反应力和表面EMG.
- 一个神经肌肉骨模型从EMG和运动数据中估计了肌力量.
主要成果:
- 根据EMG和肌肉力量的运动排名显示出弱相关性 (斯皮尔曼的 ρ = 0.29-0.51).
- 峰值EMG振幅仅解释了部肌肉力量峰值的5-19%.
- 当考虑个人和运动变化时,EMG解释了80-85%的正常部肌肉力量.
结论:
- 根据EMG振幅对关节炼的排名与按估计的肌肉力量排名有很大不同.
- 最好使用EMG来对生物力学上相似的练习进行个人内部比较.
- 在选择仅基于部EMG振幅的练习时,建议谨慎.
相关概念视频
01:20Motor Unit Stimulation
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...
01:27Exercise and Muscle Performance
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...
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...