Abstract
Abstract Aims: The influence of fluid replacement, realized during and after the exercise on individuals with coronary artery disease (CAD) remains poorly understood. To investigate the influence of hydration on cardiac autonomic modulation, cardiorespiratory parameters and perceived exertion and discommodity, of coronary heart patients submitted to cardiac rehabilitation (CR) session. Methods: This cross-over clinical trial, will recruit 31 adults with more than 45 years old, participants of a cardiovascular rehabilitation program, with CAD diagnosis. The participants will be submitted to an experimental protocol composed of three phases: I) Maximal stress test; II) Control protocol (CP); and III) Hydration protocol (HP). The CP and HP will consist of 10 min of rest in a supine position, 15 min of warming, 40 min of treadmill exercise, 5 min of cooling down and 60 min of rest in a supine position. In the HP, the participants will be hydrated with mineral water, based on the bodyweight reduction of the CP. The water intake will be divided into eight equal portions, offered during the treadmill exercise and recovery period. On CP and HP will be evaluated linear and nonlinear indices of heart rate variability, the heart rate, systolic blood pressure, diastolic blood pressure, respiratory rate, oxygen partial saturation, perceived exertion and discommodity on specifics moments. Conclusion: The results of this study will allow us to identify if the proposed protocol will be able to positively influence the outcomes and, consequently, if could be implement in the clinical practice.
Highlights
The exercise practice is associate to innumerous physical and mental benefits[1] in many populations[2,3,4,5] that include individuals with cardiovascular disease (CVD)[6,7], and the cardiovascular rehabilitation programs can promote many benefits for health, like positive changes in the cardiorespiratory and autonomic system[8,9,10,11]
Different strategies to accelerate the autonomic and cardiovascular system recovery after physical exercise practice have been studied on literature[15,16,17,18,19,20], and water intake is one of than[21,22,23]
The objective of this study aimed to investigate the influence of the hydration on cardiac autonomic modulation, through heart rate variability, cardiorespiratory parameters, subjective perceived exertion and subjective perceived pain, of coronary artery disease patients submitted to a moderate-intensity aerobic exercise
Summary
The exercise practice is associate to innumerous physical and mental benefits[1] in many populations[2,3,4,5] that include individuals with cardiovascular disease (CVD)[6,7], and the cardiovascular rehabilitation programs can promote many benefits for health, like positive changes in the cardiorespiratory and autonomic system[8,9,10,11]. During the physical exercise realization, the body temperature is high and, an increase in the transpiration rate occurs, which can promote liquid loss and if the answer is not correctly can promote a dehydrate state[12] This liquid loss induced for exercise, causes injuries on cardiovascular and autonomic systems[13,14,15] which can compromise the recovery capacity and cardiovascular health[16,17]. This thematic was investigated on health young and/or athletes with a sample that varied between 5 and 31 individuals[14,15,16,17,18,20,21,22,23,24]
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