Correlation differences in heartbeat fluctuations during rest and exercise
Correlation differences in heartbeat fluctuations during rest and exercise
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DOI：
10.1103/physreve.66.062902
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发表时间：
2002-12-01
影响因子：
2.4
通讯作者：
Havlin, S
中科院分区：
文献类型：
--
作者：
Karasik, R;Sapir, N;Havlin, S
我们研究健康个体在休息和运动时的心跳活动。我们重点研究了脉搏波连续峰值形成的间隔的相关特性，并发现休息和运动之间存在显著的比例差异。对于运动，间隔序列在短时间尺度上是反相关的，在中间时间尺度上是相关的，而对于休息，我们观察到相反的交叉模式--从短时间区域的强相关性到大尺度上的弱相关性。我们还提出了一个生理动机的随机情景，以直观地解释休息和锻炼之间的比例差异。
We study the heartbeat activity of healthy individuals at rest and during exercise. We focus on correlation properties of the intervals formed by successive peaks in the pulse wave and find significant scaling differences between rest and exercise. For exercise the interval series is anticorrelated at short-time scales and correlated at intermediate-time scales, while for rest we observe the opposite crossover pattern-from strong correlations in the short-time regime to weaker correlations at larger scales. We also suggest a physiologically motivated stochastic scenario to provide an intuitive explanation of the scaling differences between rest and exercise.