120w定量负荷运动时模拟低氧环境对HRV频域指标的影响
2020-05-21纪环黄剑雅
纪环 黄剑雅

摘 要:本文以29名竞技体育学院在校健康男性大学生为研究对象,研究了120w定量负荷运动时模拟低氧环境对HRV频域指标的影响。结果显示:2500m模拟低氧环境120w定量负荷运动时,受试者的低频值(LF)较常氧环境显著性降低,高频值(HF)较常氧环境显著性降低,而LF/HF较常氧环境无显著性差异。研究结论:LF反映交感神经活动水平,模拟低氧(2500m)环境下LF比常氧下低,交感神经活动水平降低;HF反映副交感神经活动水平,模拟低氧(2500m)环境下HF比常氧下低,副交感神經活动水平降低;模拟低氧(2500m)环境下LF/HF较常氧无显著性差异,说明低氧对交感神经与副交感神经均衡性的影响结果不明显。
关键词:心率变异性(HRV) 低氧 运动负荷
中图分类号:G808 文献标识码:A 文章编号:2095-2813(2020)04(a)-0036-02
Abstract:Based on the study of 29 healthy male college students in the athletic sports college, this paper studied the effects of simulated hypoxia environment on HRV frequency domain indicators during 120w quantitative load exercise. The results showed that when the 2500m simulated low-oxygen environment 120w quantitative load exercise, the low-frequency value (LF) of the subject was significantly lower than that of the normoxia environment, and the high-frequency value (HF) was significantly lower than that of the normoxic environment, while the LF/HF ratio was lower. There was no significant difference in the normoxic environment. Conclusion: LF reflects the level of sympathetic activity. Under simulated hypoxia (2500m) environment, LF is lower than normoxia, and sympathetic activity is lower. HF reflects parasympathetic activity and simulates HF than normoxia in hypoxic (2500m) environment. Lower and lower the level of parasympathetic activity; there was no significant difference in LF/HF compared with normoxia in the simulated hypoxia (2500m) environment, indicating that the effect of hypoxia on the balance of sympathetic and parasympathetic nerves was not obvious.
Key Words: Heart rate variability (HRV); Hypoxia; Exercise load
心率变异性(HRV)是指瞬时心率或瞬时心动周期的微小变化。它被认为是判断心脏自主神经功能活性的敏感方法,可作为反映人体植物神经活动的定量指标,主要受交感神经和副交感神经活性及其相对平衡的影响,在体育学中HRV可以为运动员选材、监测急性心性猝死、和筛选急性高原反应易感人群、评价运动效果、制定运动训练计划等提供参考依据。
1 研究对象和研究方法
1.1 研究对象
以29名竞技体育学院在校健康男性大学生为研究对象,受试者基本情况为年龄(22.4±1.8)岁,身高(176.1±4.8)cm,体重(75.1±12.3)kg。
1.2 研究方法
1.2.1 测试方法
受试者佩戴Polar r800x心率表,受试者进行3min120
w定量负荷运动,运动方式为蹬功奉自行车,节律为60mp/min。运动过程中同步获取HRV频域指标:0.04~0.15Hz低频带面积(LF),0.15~0.4Hz高频带面积(HF))和低频带面积和高频带面积的比值(LF/HF)等。……
