血流的限制增加了必要的肌肉激发的肘部 flexors 在单个高负荷收缩收缩期间
Alex A Olmos1, Tony R Montgomery1, Kylie N Sears1
1Applied Neuromuscular Physiology Laboratory, Department of Health and Human Performance, Oklahoma State University, 191 CRC, Stillwater, OK, 74074, USA.
European journal of applied physiology
|January 18, 2024
概括
血液流量限制 (BFR) 在高负荷收缩期间增强双肩肌肉激活,这表明更多的运动单元招募. 与BFR.肌肉激活策略的性别差异没有观察到.
科学领域:
- 运动生理学 运动生理学
- 神经肌肉生理学 神经肌肉生理学
- 生物医学工程 生物医学工程
背景情况:
- 了解肌肉激活对于优化训练和康复至关重要.
- 血流限制 (BFR) 是一种用于增强肌肉适应性的技术.
- 电肌图谱振幅 (EMG) 和力关系为运动单元招募提供了洞察力.
研究的目的:
- 研究BFR在高负荷肌肉动作期间对双臂肌肉的电动图幅度 (EMG) - 强力关系的影响.
- 为了确定BFR是否会影响在异位收缩期间的运动单元招募策略.
主要方法:
- 12名男性和11名女性在70%的MVC时进行了最大自愿收缩 (MVCs) 和同度梯形收缩.
- 在BFR和对照 (CON) 条件下,从两腕中记录了表面EMG.
- 分析了EMG-力关系,使用日志转换数据计算斜率 (b) 和增益 (a) 项.
主要成果:
- 在增强力阶段,BFR增加了斜率 (b项),与下降阶段和CON相比.
- 与增强阶段相比,BFR在降低力阶段增加了增强 (a项).
- 在稳定力期间正常化的EMG在BFR比CON更高,不论性别.
结论:
- 在增强和稳定力量阶段,BFR可能会增加招募更高门的动力单元.
- 与BFR观察到不同的激活和停用策略,由斜率和增益项的变化表明.
- 在BFR或CON条件下,在EMG-力关系中没有发现显著的性别差异.
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