Abstract
Introduction: Hydration plays a key role in the physiological maintenance required by exercise.
Objective:To evaluate the behavior of heart rate (HR), systolic (SBP) and diastolic (DBP) blood pressure, pulse\ oxygen saturation (SpO2 ) and respiratory rate (RR) of young people during and after prolonged physical exercise, with and without the intake of water or isotonic solution.
Method:31 young individuals (21.63 ± 1.86 years) were subjected to a four-step protocol with a 48-hour intervalbetween each step, namely: i) a test to determine the incremental load used in subsequent steps, ii) a control protocol without hydration (CP), iii) an experimental protocol with water intake (PE1), iv) an experimental protocol with ingestion of isotonic (PE2). The protocols consisted of 10 min rest, 90 min of exercise on a treadmill at 60% of VO2peak and 60 min of recovery. The parameters HR, SBP, DBP, RR and SPO2were measured at rest, at 30, 60 an 90 min of exercise, with the exception of RR; and at 1, 3, 5, 7, 10, 20, 30, 40, 50 and 60 min of recovery. The two-factor analysis of variance for repeated measures model was used for analysis (p