高压血流限制急剧减少最大扭矩和功率
Robert W Sallberg1, Yujiro Yamada1, William B Hammert1
1Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, Oxford, MS, USA.
概括
抵抗运动期间的高压血流限制 (BFR) 并没有急剧改善力量或功率. 在高压下性能下降,表明压力本身,而不是反弹效应,不会增强最大的强度或功率.
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
- 生物医学工程 生物医学工程
背景情况:
- 血液流量限制 (BFR) 与高负荷阻力运动可能会急剧增强力量和功率.
- 假设的机制涉及高袖压力的反弹效应.
- 高压对强度和功率的独立影响仍然不清楚.
研究的目的:
- 研究高压BFR在仅集中肌肉动作期间对最大强度和功率的急性影响.
- 为了确定是否高压,独立于反弹效应,影响性能.
主要方法:
- 一个复制的交叉试验,涉及25个抵抗训练的个体.
- 参与者在两个条件下完成了最大的力量和功率测试 (集中式膝盖延伸):动脉阻塞压力 (AOP) 的150%和假 (2 mmHg).
- 六次实验性访问以随机顺序进行.
主要成果:
- 在高压BFR下,峰值扭矩明显减少了-17Nm (95%CI: -22.0, -12.7),与假的相比.
- 与假装相比,在高压BFR下,峰值功率显著降低了33.9W (95%CI:-46.7,-21.2),与假装相比降低了33.9W (95%CI:-46.7,-21.2).
- 没有观察到强度或功率的急性改善.
结论:
- 在先前的高负荷BFR研究中看到的急性强度和功率优势不太可能是由于独立的压力效应.
- 高压BFR并没有急剧增强,而是减少了最大的强度和功率.
- 性能下降可能与与高压下收缩相关的不适有关.
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