卧床不同训练方法对心血管自主神经调节变化的影响

发布时间：2018-02-09 04:52

本文关键词： 失重模拟心率变异性自主神经系统头低位倾斜　出处：《航天医学与医学工程》2000年05期 　论文类型：期刊论文

【摘要】：目的以心率变异性 (HRV)频域变量 ,作为定量评价心血管自主神经调节变化的指标 ,观察卧床条件下 ,不同训练方法对心血管自主神经调节变化的影响。方法被试者为 1 5名年龄 1 9～ 2 2岁的健康男性 ,分为对照组、放松训练组和低氧训练组 ,每组 5人 ,头低位 (- 6°)卧床模拟失重时的心血管变化。在对照期 (第 2天 )、卧床期 (第 3、1 4、1 8天 )和恢复期 (第 7天 )记录 2 4h动态心电图 ,采用自回归模型进行 2 4h全程、放松和低氧训练前、中、后的心率变异性谱分析 ,其标准化的低频 (LF % ,0 .0 4～ 0 .1 5Hz)成分表示心交感神经的紧张度 ,标准化的高频 (HF % ,0 .1 5～ 0 .40Hz)成分独立地反映心迷走神经的活性 ,LF/HF的比值表明交感和迷走神经张力的平衡关系。结果卧床期对照组的LF %和HF %成分显著下降 (P 0 .0 5) ,LF/HF无明显变化。放松组在放松训练中HRV谱的HF %成分明显增加 (P 0 .0 5) ,而低氧组在低氧训练中 ,LF %成分显著增加 (P 0 .0 5)。结论卧床使交感和迷走神经的活性都降低 ,放松训练明显提高了迷走神经的兴奋性 ,而低氧训练明显提高了交感神经的兴奋性。提示 ,HRV指标有可能作为定量评价失重对抗措施的客观指标 ,值得进一步深入研究。
[Abstract]:With the purpose of heart rate variability (HRV) frequency domain variables, as the change regulation of quantitative assessment of cardiovascular autonomic nervous index, observation bed conditions, the effects of different training methods on cardiovascular autonomic regulation during the method. The subjects were 15 healthy men aged 19~22, divided into control group, hypoxia group and relaxation training the training group, each group of 5 people, the first low (- 6 degrees) in simulated weightlessness. The cardiovascular changes in the control period (second days), bed time (3,1 4,1 for 8 days) and recovery period (seventh days) recorded 2 4H dynamic electrocardiogram, using 2 4H full auto regression model, relax and hypoxia before training, the heart rate variability after the spectrum analysis, the low frequency standard (LF%, 0.04 ~ 0.1 5Hz) component of cardiac sympathetic nerve tension, high frequency standard (HF%, 0.15 ~ 0.40Hz) independent components reflecting cardiac vagus After the activity, the ratio of LF/HF showed that balance between sympathetic and vagal tone. Results LF% and HF% in control group composition decreased significantly (P 0.05), there was no significant change in LF/HF. In the HF group to relax relaxation training components significantly increased HRV spectrum% (P 0.05), while in low oxygen group hypoxic training, LF% components increased significantly (P 0.05). In conclusion the sympathetic and vagal activity decreased, relaxation training significantly increased the excitability of the vagus nerve, while hypoxia training can significantly improve the excitability of sympathetic nerve. The results indicated that the HRV index can be used as objective indicators for quantitative evaluation of weightlessness countermeasures. It is worth further study.

【作者单位】：航天医学工程研究所!北京100094 航天医学工程研究所!北京100094 航天医学工程研究所!北京100094 航天医学工程研究所!北京100094 航天医学工程研究所!北京100094 航天医学工程研究所!北京100094
【分类号】：R85

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