Acute effects of bolus water intake on post-exercise orthostatic hypotension and cardiovascular hemodynamics.

Autor: Tajima Y; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Komiyama M; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Mimura N; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Yamamoto M; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Fukuie M; Japan Society for the Promotion of Science, Tokyo, Japan., Suzuki R; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Matsushima S; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan., Hirasawa A; Faculty of Health Sciences, Department of Health and Welfare, Kyorin University, Tokyo, Japan., Shibata S; Faculty of Health Sciences, Department of Physical Therapy, Kyorin University, Tokyo, Japan. shigekishibata@ks.kyorin-u.ac.jp.
Jazyk: angličtina
Zdroj: Clinical autonomic research : official journal of the Clinical Autonomic Research Society [Clin Auton Res] 2024 Oct 30. Date of Electronic Publication: 2024 Oct 30.
DOI: 10.1007/s10286-024-01077-6
Abstrakt: Introduction: Water intake is known to be effective in preventing orthostatic hypotension (OH). However, it is unknown whether water intake would be effective in acutely preventing exercise-induced OH.
Methods: Fourteen adults (men/women: 7/7, age: 20 ± 8 years) were recruited. Each subject underwent two protocols with and without 500 ml water intake using a randomized crossover design (Water vs. Control). Participants underwent 30 min of cycle ergometry at the 60-70% predicted VO 2 max. OH and hemodynamics were assessed before and after exercise, and immediately (Water 1) and 20 min (Water 2) after the water intake. OH was evaluated with a 1-min standing test as the criteria for systolic blood pressure (SBP) < 90 mmHg. A cross-spectral analysis for RR and SBP variability was used to evaluate the cardiac autonomic activity and baroreflex sensitivity.
Results: In both protocols, the incidence of OH increased after the exercise. The incidence of OH was lower in Water than in Control at Water 1 (OR: 0.093, 95% CI: 0.015-0.591). Heart rate was lower and SBP was higher in Water than in Control at Water 1 and 2 (P < 0.05). High-frequency power of RR variability and transfer function gains in Water were normalized and higher than in Control at Water 1 and 2 (P < 0.05). The ratio of low- to high-frequency power of RR variability in Water was normalized and lower in Water than in Control at Water 1 (P < 0.05).
Conclusion: Our findings indicate that water intake may prevent acute exercise-induced OH, accompanied by normalized cardiac autonomic activity and baroreflex sensitivity.
(© 2024. Springer-Verlag GmbH Germany.)
Databáze: MEDLINE
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