Influence of nighttime bathing on evening home blood pressure measurements

How long should the interval be after bathing?

Hiroshi Kawabe, Ikuo Saito

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The Japanese Society of Hypertension has recommended that evening home blood pressure measurement be taken just before bedtime. In this study, to elucidate the influence of nighttime bathing on evening home blood pressure and heart rate, measurements were performed for 7 days using volunteers who were employees of a single company and who had no alcohol intake during the study period. We used data obtained from 158 subjects (78 males and 80 females; mean age, 41.6 years) whose evening data consisted of a combination of pre-bathing and post-bathing measurements. We divided the subjects into four groups according to the time interval from bathing: blood pressure was measured at 30 min after bathing in group I (n=40), at 31-60 min after bathing in group II (n=89), at 61-120 min after bathing in group III (n=74) and at more than 121 min after bathing in group IV (n=53). We evaluated the changes after bathing in each group. For all subjects combined, the evening home blood pressure measured after bathing (114.0±17.1/69.4±10.9 mmHg) was significantly lower than the value before bathing (116.3±17. 1/70.7±11.2 mmHg). However, there was no difference in heart rate. Both systolic and diastolic blood pressure after bathing in group I (109.1±15.2/ 66.3±10.8 mmHg) and II (112.0±15.2 /66.5±10.1 mmHg) were significantly lower than those before bathing (group I: 113.2±15.8/70.2±10.6 mmHg; group II: 115.2±15.8/69.3±10.3 mmHg), but these differences disappeared in group III and IV. On the other hand, there was no difference in heart rate after bathing in group I, II, or III, but group IV showed a slight but significant decrease after bathing (67.7±10.0→65.8±10.7 beats/min). In conclusion, if evening home blood pressure is to be measured after bathing, subjects should be instructed to wait more than 60 min after bathing before performing the measurement in order to eliminate the depressor effect of bathing.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalHypertension Research
Volume29
Issue number3
DOIs
Publication statusPublished - 2006 Mar

Fingerprint

Blood Pressure
Heart Rate
Volunteers
Alcohols
Hypertension

Keywords

  • Bathing
  • Evening home blood pressure
  • Heart rate

ASJC Scopus subject areas

  • Internal Medicine

Cite this

Influence of nighttime bathing on evening home blood pressure measurements : How long should the interval be after bathing? / Kawabe, Hiroshi; Saito, Ikuo.

In: Hypertension Research, Vol. 29, No. 3, 03.2006, p. 129-133.

Research output: Contribution to journalArticle

@article{a01a3280d66d4c298a4913703c46fd3e,
title = "Influence of nighttime bathing on evening home blood pressure measurements: How long should the interval be after bathing?",
abstract = "The Japanese Society of Hypertension has recommended that evening home blood pressure measurement be taken just before bedtime. In this study, to elucidate the influence of nighttime bathing on evening home blood pressure and heart rate, measurements were performed for 7 days using volunteers who were employees of a single company and who had no alcohol intake during the study period. We used data obtained from 158 subjects (78 males and 80 females; mean age, 41.6 years) whose evening data consisted of a combination of pre-bathing and post-bathing measurements. We divided the subjects into four groups according to the time interval from bathing: blood pressure was measured at 30 min after bathing in group I (n=40), at 31-60 min after bathing in group II (n=89), at 61-120 min after bathing in group III (n=74) and at more than 121 min after bathing in group IV (n=53). We evaluated the changes after bathing in each group. For all subjects combined, the evening home blood pressure measured after bathing (114.0±17.1/69.4±10.9 mmHg) was significantly lower than the value before bathing (116.3±17. 1/70.7±11.2 mmHg). However, there was no difference in heart rate. Both systolic and diastolic blood pressure after bathing in group I (109.1±15.2/ 66.3±10.8 mmHg) and II (112.0±15.2 /66.5±10.1 mmHg) were significantly lower than those before bathing (group I: 113.2±15.8/70.2±10.6 mmHg; group II: 115.2±15.8/69.3±10.3 mmHg), but these differences disappeared in group III and IV. On the other hand, there was no difference in heart rate after bathing in group I, II, or III, but group IV showed a slight but significant decrease after bathing (67.7±10.0→65.8±10.7 beats/min). In conclusion, if evening home blood pressure is to be measured after bathing, subjects should be instructed to wait more than 60 min after bathing before performing the measurement in order to eliminate the depressor effect of bathing.",
keywords = "Bathing, Evening home blood pressure, Heart rate",
author = "Hiroshi Kawabe and Ikuo Saito",
year = "2006",
month = "3",
doi = "10.1291/hypres.29.129",
language = "English",
volume = "29",
pages = "129--133",
journal = "Hypertension Research",
issn = "0916-9636",
publisher = "Nature Publishing Group",
number = "3",

}

TY - JOUR

T1 - Influence of nighttime bathing on evening home blood pressure measurements

T2 - How long should the interval be after bathing?

AU - Kawabe, Hiroshi

AU - Saito, Ikuo

PY - 2006/3

Y1 - 2006/3

N2 - The Japanese Society of Hypertension has recommended that evening home blood pressure measurement be taken just before bedtime. In this study, to elucidate the influence of nighttime bathing on evening home blood pressure and heart rate, measurements were performed for 7 days using volunteers who were employees of a single company and who had no alcohol intake during the study period. We used data obtained from 158 subjects (78 males and 80 females; mean age, 41.6 years) whose evening data consisted of a combination of pre-bathing and post-bathing measurements. We divided the subjects into four groups according to the time interval from bathing: blood pressure was measured at 30 min after bathing in group I (n=40), at 31-60 min after bathing in group II (n=89), at 61-120 min after bathing in group III (n=74) and at more than 121 min after bathing in group IV (n=53). We evaluated the changes after bathing in each group. For all subjects combined, the evening home blood pressure measured after bathing (114.0±17.1/69.4±10.9 mmHg) was significantly lower than the value before bathing (116.3±17. 1/70.7±11.2 mmHg). However, there was no difference in heart rate. Both systolic and diastolic blood pressure after bathing in group I (109.1±15.2/ 66.3±10.8 mmHg) and II (112.0±15.2 /66.5±10.1 mmHg) were significantly lower than those before bathing (group I: 113.2±15.8/70.2±10.6 mmHg; group II: 115.2±15.8/69.3±10.3 mmHg), but these differences disappeared in group III and IV. On the other hand, there was no difference in heart rate after bathing in group I, II, or III, but group IV showed a slight but significant decrease after bathing (67.7±10.0→65.8±10.7 beats/min). In conclusion, if evening home blood pressure is to be measured after bathing, subjects should be instructed to wait more than 60 min after bathing before performing the measurement in order to eliminate the depressor effect of bathing.

AB - The Japanese Society of Hypertension has recommended that evening home blood pressure measurement be taken just before bedtime. In this study, to elucidate the influence of nighttime bathing on evening home blood pressure and heart rate, measurements were performed for 7 days using volunteers who were employees of a single company and who had no alcohol intake during the study period. We used data obtained from 158 subjects (78 males and 80 females; mean age, 41.6 years) whose evening data consisted of a combination of pre-bathing and post-bathing measurements. We divided the subjects into four groups according to the time interval from bathing: blood pressure was measured at 30 min after bathing in group I (n=40), at 31-60 min after bathing in group II (n=89), at 61-120 min after bathing in group III (n=74) and at more than 121 min after bathing in group IV (n=53). We evaluated the changes after bathing in each group. For all subjects combined, the evening home blood pressure measured after bathing (114.0±17.1/69.4±10.9 mmHg) was significantly lower than the value before bathing (116.3±17. 1/70.7±11.2 mmHg). However, there was no difference in heart rate. Both systolic and diastolic blood pressure after bathing in group I (109.1±15.2/ 66.3±10.8 mmHg) and II (112.0±15.2 /66.5±10.1 mmHg) were significantly lower than those before bathing (group I: 113.2±15.8/70.2±10.6 mmHg; group II: 115.2±15.8/69.3±10.3 mmHg), but these differences disappeared in group III and IV. On the other hand, there was no difference in heart rate after bathing in group I, II, or III, but group IV showed a slight but significant decrease after bathing (67.7±10.0→65.8±10.7 beats/min). In conclusion, if evening home blood pressure is to be measured after bathing, subjects should be instructed to wait more than 60 min after bathing before performing the measurement in order to eliminate the depressor effect of bathing.

KW - Bathing

KW - Evening home blood pressure

KW - Heart rate

UR - http://www.scopus.com/inward/record.url?scp=33646075435&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33646075435&partnerID=8YFLogxK

U2 - 10.1291/hypres.29.129

DO - 10.1291/hypres.29.129

M3 - Article

VL - 29

SP - 129

EP - 133

JO - Hypertension Research

JF - Hypertension Research

SN - 0916-9636

IS - 3

ER -