Heart rate recovery after exercise: relations to heart rate variability and complexity
Heart rate recovery after exercise: relations to heart rate variability and complexity
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DOI：
10.1590/s0100-879x2002000800018
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发表时间：
2002-08-01
影响因子：
2.3
通讯作者：
Javorka, K.
中科院分区：
文献类型：
--
作者：
Javorka, M.;Zila, I.;Javorka, K.
体育锻炼与副交感神经退缩和交感神经活动增加有关，导致心率增加。运动后心脏减速率被用作心脏迷走神经再激活的指标。心率变异性 (HRV) 和复杂性分析可以提供有关心血管系统自主控制的有用信息。本研究的目的是确定运动后心率下降与 HRV 参数之间的关联。对 17 名健康男性受试者（平均年龄：20 岁）在运动前阶段（仰卧 25 分钟，站立 5 分钟）、运动期间（步进测试 8 分钟，上升频率对应于个体最大功率输出的 70%）和恢复阶段（仰卧 30 分钟）期间的心率进行监测。对选定的心率时间序列片段进行时域和频域的 HRV 分析以及新开发的复杂性测量（样本熵）的评估。恢复期间，心率逐渐下降，但运动后30分钟内未达到运动前的值。另一方面，研究期间HRV逐渐升高，但并未恢复静息值。运动后心率复杂度略有降低，并在 30 分钟恢复后达到休息值。心脏减速率与运动前 HRV 参数无关，但与 HRV 测量值和恢复早期获得的样本熵呈正相关。总之，心脏减速率与休息期间的 HRV 测量无关，但与运动后早期恢复的 HRV 测量相关，证实了副交感神经对此阶段的贡献。
Physical exercise is associated with parasympathetic withdrawal and increased sympathetic activity resulting in heart rate increase. The rate of post-exercise cardiodeceleration is used as an index of cardiac vagal reactivation. Analysis of heart rate variability (HRV) and complexity can provide useful information about autonomic control of the cardiovascular system. The aim of the present study was to ascertain the association between heart rate decrease after exercise and HRV parameters. Heart rate was monitored in 17 healthy male subjects (mean age: 20 years) during the pre-exercise phase (25 min supine, 5 min standing), during exercise (8 min of the step test with an ascending frequency corresponding to 70% of individual maximal power output) and during the recovery phase (30 min supine). HRV analysis in the time and frequency domains and evaluation of a newly developed complexity measure - sample entropy - were performed on selected segments of heart rate time series. During recovery, heart rate decreased gradually but did not attain pre-exercise values within 30 min after exercise. On the other hand, HRV gradually increased, but did not regain rest values during the study period. Heart rate complexity was slightly reduced after exercise and attained rest values after 30-min recovery. The rate of cardiodeceleration did not correlate with pre-exercise HRV parameters, but positively correlated with HRV measures and sample entropy obtained from the early phases of recovery. In conclusion, the cardiodeceleration rate is independent of HRV measures during the rest period but it is related to early post-exercise recovery HRV measures, confirming a parasympathetic contribution to this phase.