| 短臂离心机训练时前庭刺激对心血管功能的影响 |
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| 引用本文： | 赵吉林,王永春,孙喜庆. 短臂离心机训练时前庭刺激对心血管功能的影响[J]. 心脏杂志, 2017, 29(1): 93-097 |
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| 作者姓名： | 赵吉林 王永春 孙喜庆 |
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| 作者单位： | （第四军医大学:1.2011级学员队,2.航空航天医学系航空航天生物动力学教研室,西安 710032） |
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| 基金项目： | 全军后勤科研重大项目资助（AWS12J003-01）
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| 摘 要： | 目的 探讨短臂离心机训练过程中增加前庭功能刺激对心血管功能的影响。方法 9名被试者分别完成不转头和间断左右转头45度两次人体短臂离心机暴露,足水平2 Gz,持续10 min,记录实验过程中被试者血压、心率等变化并进行心率变异性分析,同时进行前庭功能评价。结果 在短臂离心机暴露复合前庭刺激时,被试者心率、舒张压、心率变异性低频功率、低频功率/高频功率较暴露前均显著升高（P<0.05,舒张压P<0.01）,心率变异性高频功率显著降低（P<0.05）;与单独短臂离心机暴露相比,舒张压显著升高（P<0.05）,低频功率/高频功率呈现升高趋势,但未达到显著水平。结论 短臂离心机暴露复合前庭刺激可增强心脏交感神经兴奋性,改善心血管功能,有助于提高训练效果。
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| 关 键 词： | 心血管功能 前庭刺激 短臂离心机 训练 |
| 收稿时间： | 2015-12-14 |
Effect of vestibular stimulation on cardiovascular function during short-arm centrifugation |
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| Abstract: | AIM To observe the effect of vestibular stimulation by head movement on cardiovascular functions during short-arm centrifugation. METHODSNine subjects were exposed to short-arm centrifuge of 2 Gz at feet level for 10 min with head still and intermittent separate head-turns. Heart rate, blood pressure and heart rate variability (HRV) were measured and vestibular function was evaluated during exposure. RESULTSCompared to those pre-exposure, heart rate, diastolic pressure, low frequency of HRV and the ratio of low frequency to high frequency (LH/HF) decreased significantly in subjects with head-turns during short-arm centrifugation. Diastolic pressure was significantly higher, whereas LH/HF had a tendency to increase in the subjects with head-turns compared with those in the subjects with head still during short-arm centrifugation. CONCLUSIONShort-arm centrifugation combined with vestibular stimulation enhances the excitability of cardiac sympathetic nerves and promotes cardiovascular functions, thus improving training efficiency. |
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