Efeitos da ingestão de diferentes soluções hidratantes nos níveis de hidratação e na frequência cardíaca durante um exercício de natação intervalado

Abstract

This study aimed to identify the hydration levels and interference in the heart rate as a result of adopting different hydration procedures during a swimming exercise with intervals. A total of 15 male athletes with age 18–26 years (20.7±3.8 years) was submitted to the following procedures: a) no type of hydration, b) hydration with placebo, and c) hydration with Gatorade®. Each treatment corresponded to a total distance of 4150 meters divided in 250 meters of warm-up; 1 x 400 meters at maximum velocity; 1 x 100 meters in recovery; 10 x 250 meters at 85–90% of maximum velocity for this distance, with inter- vals of 50 meters in recovery and 400 meters at maximum velocity. Heart rate, body weight before and after each test, amount of liquid consumed during exercise and urine produced were measured to esta- blish the hydration levels. No statistically significant difference (p>0.05) was found on the time effect and between the groups in any of the two parameters analyzed. It can be concluded that the hydration procedures adopted did not influence the heart rate and hydration level responses during the experimental model developed.