The influence of short-term sedentary behavior on circadian rhythm of heart rate and heart rate variability
The influence of short-term sedentary behavior on circadian rhythm of heart rate and heart rate variability
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DOI：
10.1080/07420528.2018.1550422
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发表时间：
2019-01-01
影响因子：
2.8
通讯作者：
Shiotani, Hideuki
中科院分区：
文献类型：
--
作者：
Miyagi, Rika;Sasawaki, Yuh;Shiotani, Hideuki
久坐行为对人体健康有害的观念普遍存在。关于久坐行为对心率（HR）和心率变异性（HRV）昼夜节律的短期影响知之甚少。因此，本研究的目的是研究短期久坐行为对心率和心率变异性的昼夜节律的影响，采用余弦周期回归分析。16名健康青年学生被纳入一项随机交叉研究。所有受试者在两种不同的身体活动状态下进行24小时ECG Hotter监测，活动状态（每天超过15，000步）和久坐状态（每天少于1，000步）。计算HR和HRV的小时平均值，然后使用余弦周期回归分析进行评估。获得了HR和HRV变量的昼夜节律参数，振幅，中位和峰值。结果，证实了每种条件下所有变量的昼夜节律的重要性。在久坐状态下，拟合R2值降低。就心率而言，久坐状态的振幅显著小于活动状态的振幅（7.94 +/- 1.91 bpm vs. 15.4 +/- 3.93 bpm，p < 0.001），高频测量值的自然对数（InHF）（0.38 +/- 0.21 ms 2 vs. 0.80 +/- 0.28 ms 2，p < 0.001）和低频/高频比（LF/HF）（0.75 +/- 0.54 vs. 1.24 +/- 0.69，p = 0.008）。我们发现，久坐行为不仅显著降低了HR和HRV变量的幅度，而且可能导致HR和HRV变量的昼夜节律减弱。
The notion that sedentary behavior is harmful to human health is widespread. Little is known about the short term influence of sedentary behavior on heart rate (HR) and heart rate variability (HRV) circadian rhythms. Therefore the purpose of the present study was to examine the influence of short term sedentary behavior on the circadian rhythms of HR and HRV using cosine periodic regression analysis. Sixteen healthy young students were included in a randomized crossover study. All subjects underwent 24-h ECG Hotter monitoring in two different states of physical activity, an active condition (more than 15,000 steps per day) and a sedentary condition (less than 1,000 steps per day). Hourly mean values were calculated for HR and HRV, and then were evaluated using cosine periodic regression analysis. The circadian rhythm parameters, amplitude, mesor, and acrophase for HR and HRV variables were obtained. As a result, the significance of the circadian rhythm was confirmed for all variables in each condition. The measure of fit R2 value was decreased in sedentary condition. The amplitude of the sedentary condition was significantly smaller than that of the active condition with respect to HR (7.94 +/- 1.91 bpm vs. 15.4 +/- 3.93 bpm, p < 0.001), natural log of the high frequency measurement (InHF) (0.38 +/- 0.21 ms2 vs. 0.80 +/- 0.28 ms2, p < 0.001), and low frequency/high frequency ratio (LF/HF) (0.75 +/- 0.54 vs. 1.24 +/- 0.69, p = 0.008). We found that sedentary behavior not only significantly lowered the amplitude of HR and HRV variables, but also might have led to weakness of the circadian rhythm of the HR and HRV variables.