比较神经肌肉反应的血流限制和冰的应用在最大努力膝盖延伸和曲:一个随机的,受控的,交叉试验
Clifton Holmes1,2, Bjoern Hornikel3, Abby R Fleming4
1USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States.
概括
在腿部最大收缩期间,血液流量限制 (BFR) 和冰应用没有改变肌肉激活. 然而,BFR导致机械输出减少,而不是控制和冰的条件.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 生物力学 生物力学
背景情况:
- 血液流量限制 (BFR) 和冰应用是常见的干预措施,用于影响对运动的生理反应.
- 了解它们对肌肉表现和神经肌肉活动的急性影响对于优化训练和康复方案至关重要.
研究的目的:
- 调查BFR和冰应用在最大力度腿部运动期间对肌肉性能和神经肌肉招募的急性影响.
- 将这些效应与对照条件进行比较.
主要方法:
- 15名经过抵抗训练的个体在异动力动力计上进行了最大努力的膝盖延伸和曲.
- 测试了三个条件:控制 (CON),冰应用 (ICE) 和血流限制 (BFR) 在80%的闭塞压力下.
- 电肌图 (EMG) 测量了根平均平方 (RMS) 肌肉招募,而峰值扭矩 (PT),每次工作 (WK) 和每次平均功率 (PWR) 评估了机械输出.
主要成果:
- 在CON,ICE和BFR条件之间没有观察到肌肉激活 (RMS) 的显著差异.
- 与CON和ICE相比,血液流量限制 (BFR) 导致腿部延伸和屈曲的机械输出 (PT,WK,PWR) 显著降低.
- 肌肉招募显示了不同组的差异,特别是在右腿,这表明疲劳会随着时间的推移而产生影响.
结论:
- 腿部最大收缩期间的血液流量限制 (BFR) 会导致类似的肌肉激活,但与对照和冰应用相比,机械输出减少.
- 在这种情况下,冰应用似乎不会显著影响急性肌肉性能或神经肌肉招募.
- 进一步的研究可能会探索最佳的BFR参数,以提高绩效或实现特定的培训目标.
更多相关视频
相关概念视频
Applications of Integration to Find Blood Flow
62
Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...
62
Blood Flow
76.3K
Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
76.3K
Crossover Experiments
4.6K
Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
4.6K
Control Systems: Applications
1.2K
Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
1.2K
Control of Power Flow
701
There are several methods to control power flow in power systems:
701
Autoregulation of Blood Flow
8.2K
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
8.2K


