James Gary D, Bovbjerg Dana H, Hill Leah A
Department of Anthropology, Binghamton University, Binghamton, New York, 13902; Decker School of Nursing, Department of Bioengineering, Binghamton University, Binghamton, New York, 13902.
Am J Hum Biol. 2015 Jan-Feb;27(1):136-8. doi: 10.1002/ajhb.22609. Epub 2014 Aug 25.
As daily environments change, behavior and activity also change and as blood pressure (BP) and heart rate (HR) are allostatically tied to these factors, one might expect that environments that elicit the greatest behavioral/activity variation should also evince the highest BP and HR variability [standard deviation (SD) or coefficient of variation (CV)]. The purpose of this study was to evaluate this premise.
Two hundred and six women (age = 37.6 ± 9.1 years) wore an ambulatory BP monitor on a midweek workday. All worked in clerical, technical, or professional positions. Ambulatory BP and HR Means, SDs and CVs at work (11 AM-3 PM), home (∼6-10 PM) and during sleep (∼10 PM-6 AM) were compared using repeated measures ANCOVA.
Mean BP and HR decreased from work and home to sleep [121 ± 11, 120 ± 11 vs. 107 ± 12 systolic; 82 ± 10, 80 ± 11 vs. 66 ± 11 diastolic; 79 ± 12, 80 ± 12 vs. 68 ± 11 HR (all P < 0.001)], while the CV of systolic and diastolic BP increased [0.06 ± 0.02, 0.07 ± 0.02 vs. 0.08 ± 0.03 systolic; 0.09 ± 0.03, 0.10 ± 0.04 vs. 0.12 ± 0.05 diastolic (P < 0.001)]. The HR SD decreased during sleep [8.1 ± 3.8, 8.2 ± 3.8 vs. 6.9 ± 3.2 (P < 0.001)].
HR variability follows the expected variability pattern with behavior and activity, whereas BP does not.
随着日常环境的变化,行为和活动也会改变,由于血压(BP)和心率(HR)与这些因素存在非稳态关联,人们可能会预期,引发最大行为/活动变化的环境也应表现出最高的血压和心率变异性[标准差(SD)或变异系数(CV)]。本研究的目的是评估这一前提。
206名女性(年龄 = 37.6 ± 9.1岁)在工作日的周三佩戴动态血压监测仪。她们均从事文职、技术或专业工作。使用重复测量协方差分析比较工作时间(上午11点至下午3点)、家中(晚上6点至10点左右)和睡眠期间(晚上10点至早上6点)的动态血压和心率均值、标准差和变异系数。
收缩压、舒张压和心率均值从工作和家中到睡眠期间均下降[收缩压:121 ± 11、120 ± 11 vs. 107 ± 12;舒张压:82 ± 10、80 ± 11 vs. 66 ± 11;心率:79 ± 12、80 ± 12 vs. 68 ± 11(均P < 0.001)],而收缩压和舒张压的变异系数增加[收缩压:0.06 ± 0.02、0.07 ± 0.02 vs. 0.08 ± 0.03;舒张压:0.09 ± 0.03、0.10 ± 0.04 vs. 0.12 ± 0.05(P < 0.001)]。心率标准差在睡眠期间下降[8.1 ± 3.8、8.2 ± 3.8 vs. 6.9 ± 3.2(P < 0.001)]。
心率变异性与行为和活动遵循预期的变异性模式,而血压则不然。