血液流量受限训练和时间试验表现:对世界级手的队列研究
Kyle M A Thompson1, Wendy A Pethick2, Jordan Clarke3
1Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, CANADA.
Medicine and science in sports and exercise
|April 15, 2024
概括
血液流量限制 (BFR) 训练改善了精英运动员2000米划船计时赛的表现. 虽然生理标志物看到了一些改善,但它们与增强的划船性能没有直接相关.
科学领域:
- 运动科学 运动科学 运动科学
- 运动生理学 运动生理学
- 划船表演 划船表演
背景情况:
- 精英划艇者经常经历激烈的训练.
- 最小的高强度工作时间可以从补充培训方法中受益.
- 血液流量限制 (BFR) 是一个潜在的训练模式来探索.
研究的目的:
- 为了研究将血流限制 (BFR) 训练纳入低强度训练块的影响.
- 评估BFR训练对精英划船员2000米划船人体力计计计时试验 (TT) 绩效的影响.
- 为了确定生理标志物 (V·O2max,乳酸值,Hb质量) 的变化是否与TT性能改善相关.
主要方法:
- 在4周的时间里,采用了准实验性的观察性研究设计.
- 参与者接受了BFR划船训练 (11次2x10分钟的2mmol·L-1血乳酸).
- 测量包括2000m TT,V̇O2max,血液乳酸值和Hb质量,在干预前后进行分析.
主要成果:
- 在2000米TT表现中,男性和女性手均观察到显著的改进 (约. 这是1.1%).
- 在血中乳酸盐度为2和4mmol·L−1时,工作率在两种性别中都显著增加.
- 在女性中,VO2max增加,但在任何性别中都没有检测到Hb质量的显著变化. TT性能增长与生理变化没有相关性.
结论:
- 四周的BFR训练为精英划船员带来了2000米TT表现的比典型的更大改进.
- 在训练区块期间发生了生理适应,但没有从统计学上解释TT表现的观察到的改善.
- BFR训练似乎是训练块的有效补充,使用最小的高强度工作来提高划船性能.
相关概念视频
01:29Blood Flow
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.
01:17Exercise and Cardiac Output
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Sustained exercise increases the muscles' oxygen demand, which can be met...
01:17Autoregulation of Blood Flow
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.
01:20Exercise and Cardiovascular Response
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...