Increased afternoon step count increases heart rate variability in patients with cardiovascular risk factors
Increased afternoon step count increases heart rate variability in patients with cardiovascular risk factors
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下午步数增加会增加患有心血管危险因素的患者的心率变异性
DOI：
10.1111/jocn.16018
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发表时间：
2021
影响因子：
4.2
通讯作者：
Hirai Makoto
中科院分区：
文献类型：
--
作者：
Nakayama Natsuki;Miyachi Masahiko;Tamakoshi Koji;Morikawa Shuji;Negi Koji;Watanabe Koji;Moriwaki Yoshimi;Hirai Makoto
目的和目的本研究探讨了在有心血管危险因素的患者中，上午或下午活动是否更有效地增加高频（HF）指数（一种副交感神经指数）。背景HF指数（一种心率变异性（HRV）参数）降低是心血管预后不良的公认标志。由于血压和交感神经张力在上午较高，因此建议心血管疾病患者在下午进行体力活动和锻炼。然而，还没有关于下午锻炼对副交感神经活动和sleep.DesignThis观察性研究是一个事后comparison.MethodsPatients的身体活动进行了测量1个月，以确定他们的习惯优越的效果的报告。通过24小时霍尔特心电图测量患者的HF指数。该研究招募了56名患者。比较每位患者的早晨步数（午餐前）和下午步数（午餐和晚餐之间）。在本研究中，我们遵守了STROBE指南。结果31例患者在上午采取了更多的步骤，25例患者在下午采取了更多的步骤。目前的研究表明，那些在下午走更多步数的人在入睡后的第一个小时内和睡眠期间的HF指数明显高于那些在早上走更多步数的人（p= 0.003，0.047）结论本研究表明，下午走更多步的人在入睡后第一个小时内的HF指数显著较高，与临床实践的相关性下午锻炼不仅可以防止过高的血压、后负荷和交感神经紧张，而且还可以积极影响副交感神经系统和睡眠，从而改善心血管疾病患者的预后。
Aims and objectivesThe present study investigated whether morning or afternoon activity is more effective at increasing the high‐frequency (HF) index, a parasympathetic index, in patients with cardiovascular risk factors.BackgroundA decreased HF index, a heart rate variability (HRV) parameter, is a well‐established marker of poor cardiovascular prognosis. Because blood pressure and sympathetic tone are higher in the morning, physical activity and exercise in the afternoon has been recommended for patients with cardiovascular diseases. However, there have been no reports concerning the superior effects of afternoon exercise on parasympathetic activity and sleep.DesignThis observational study was a post hoc comparison.MethodsPatients’ physical activity was measured for 1 month to determine their habits. Patients’ HF index was measured by 24‐h Holter electrocardiography. The study enrolled 56 patients. Each patient’s morning step count (before lunch) and afternoon step count (between lunch and dinner) were compared. We adhered to the STROBE guidelines in the present study.ResultsThirty‐one patients took more steps in the morning, and 25 patients took more steps in the afternoon. The present study showed that those who took more steps in the afternoon had a significantly higher HF index during the first hour after sleep onset and during sleep than those who took more steps in the morning (p= .003, .047).ConclusionsThe present study showed that those who took more steps in the afternoon had a significantly higher HF index during the first hour after sleep onset and a higher HF index during sleep than those who took more steps in the morning.Relevance to clinical practiceExercise in the afternoon may improve the prognosis in patients with cardiovascular disease by not only preventing excessive blood pressure, afterload, and sympathetic tone but also positively influencing the parasympathetic system and sleep.