在开始自愿运动之前,在具有更高峰有氧能力的年轻男性中,增强了脑心血管反应
Kazumasa Manabe1, Shizue Masuki1,2, Hiroshi Nose3
1Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan.
运动前的30秒倒计时可以增强大脑血流和血压反应,特别是在氧气吸收峰值 (VO2峰值) 较高的个体中. 这种运动前的刺激也可能在运动开始时加快氧气的使用.
科学领域:
- 运动生理学 运动生理学
- 心血管生理学心血管生理学
- 神经科学是一个神经科学.
背景情况:
- 以前的研究表明,在自愿运动之前的倒计时 (CD) 引发大脑激活和压力反应,导致血管扩张.
- 目前的研究调查了这些运动前的生理反应是否受到个体的有氧健身水平的调节,特别是氧气吸收峰值 (VO2峰值).
研究的目的:
- 为了确定是否对运动前倒计时的脑心血管反应在具有更高氧气吸收峰值 (VO2峰值) 的个体中得到增强.
- 为了检查VO2峰值和运动前倒计时引起的生理反应 (大脑血流,血压,心脏输出) 之间的关系.
主要方法:
- 27名年轻人参加了这项研究,他们的VO2峰值范围很广 (25.261.4毫升·公斤-1·分钟-1).
- 参与者进行了试验,在骑自行车在50%的VO2峰值之前,有和没有30秒倒计时 (CD+与CD-).
- 测量包括中脑动脉速度 (V_MCA),平均动脉压 (MAP),心脏输出量 (Q̇c) 和肌肉氧和,分别使用多普勒超声波,光透视图,Modelflow和近红外光谱学.
主要成果:
- 根据CD+期间V_MCA和MAP的增加,对象被分为"响应者" (Resp,n=11) 或"最小响应者" (MinResp,n=16).
- 脑心血管和氧气吸收 (VO2) 对倒计时的反应在Resp中明显大于MinResp (P<0.017).
- 脑心血管反应与两个组的个人VO2峰值有显著的正相关性 (P<0.034).
结论:
- 在运动前,脑心血管对倒计时的反应在具有更高氧气吸收峰值 (VO2峰值) 的年轻男性中得到增强.
- 这种对倒计时的增强反应可能有助于在运动开始时更快地开始消耗氧气.
- 个人的有氧健身水平在调节对运动的生理预测反应方面发挥着作用.
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