Hydration Does Not Change Postexercise Hypotension and Its Mechanisms

Author(s)

Lobo, Fernando S. ^[1] ; Queiroz, Andreia C. C. ^[2] ; Silva Junior, Natan D. ^{[1, 3]} ; Medina, Fabio L. ^{[1, 3]} ; Costa, Luiz A. R. ^{[1, 3]} ; Tinucci, Tais ^{[1, 3]} ; Forjaz, Claudia L. M. ^{[1, 3]}

Affiliation

^[1] Univ Sao Paulo, Sch Phys Educ & Sport, Exercise Hemodynam Lab, Sao Paulo - Brazil

^[2] Univ Fed Juiz de Fora, Phys Educ Dept, Juiz De Fora, MG - Brazil

^[3] Queiroz, Andreia C. C., Univ Fed Juiz de Fora, Phys Educ Dept, Juiz De Fora, MG, Brazil.Lobo, Fernando S., Univ Sao Paulo, Sch Phys Educ & Sport, Exercise Hemodynam Lab, Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHYSICAL ACTIVITY & HEALTH; v. 17, n. 5, p. 533-539, MAY 2020.
• Web of Science Citations: 0

Abstract

Background: Drinking water is recommended before and after exercise to avoid dehydration. However, water ingestion may mitigate or prevent postexercise hypotension. This study investigated the effects of intentional hydration on postaerobic exercise hemodynamics and autonomic modulation. Methods: A total of 18 young men randomly underwent 4 experimental sessions as follows: (1) control with intentional hydration (1 L of water in the previous night, 500 mL 60 min before the intervention, and 1 mL for each 1 g of body mass lost immediately after the intervention); (2) control without intentional hydration (ad libitum water ingestion before the intervention); (3) exercise (cycle ergometer, 45 min, 50% of VO(2)peak) with intentional hydration; and (4) exercise without intentional hydration. Hemodynamic and autonomic parameters were measured before and after the interventions and were compared by 3-way analysis of variance. Results: Intentional hydration did not change any postexercise hemodynamic nor autonomic response. Exercise decreased systolic blood pressure and stroke volume (-4.1 {[}0.8] mm Hg and -4.9 {[}1.5] mL, P<.05), while increased cardiac sympathovagal balance (0.3 {[}0.3], P<.05) during the recovery. In addition, it abolished the increase in diastolic blood pressure and the decrease in heart rate observed in the control sessions. Conclusion: Intentional hydration does not modify the hypotensive effect promoted by previous aerobic exercise and did not alter its hemodynamic and autonomic mechanisms. (AU)

• FAPESP's process: 07/08355-1 - Effect of hydration on post-exercise hypotension and its mechanisms
• Grantee: Cláudia Lúcia de Moraes Forjaz
• Support Opportunities: Regular Research Grants