Effect of a caffeinated sports drink on the hydration status of Brazilian soccer players
Abstract
The consumption of sports drinks with or without caffeine has been used by athletes for improving sport performance.The purpose of this study was to compare the effect of the
consumption of a caffeinated sports drink (CSD) and of a commercial carbohydrate drink (CCD) on soccer players’ hydration balance. In one game they ingested CSD, and in the other CCD, consuming 5 ml.kg-1 of body weight (BW) 20 minutes before the game started, and 3 ml.kg-1 of BW at 0, 15, 30 e 45 minutes after the beginning of the game. The test used is “t” Student paired to verify the differences between periods and before and after treatment. ANOVA Two Way was used with for repeated measures supplemented by the Tukey post hoc test. Study treatments differed significantly; CSD led to greater rates of body weight loss, dehydration degrees, relative dehydration, absolute dehydration, and sweating. There was no statistical difference in the amount of urine eliminated during the game. CSD ingestion led to significantly lower fluid replenishment (75,0 ± 13,3%) than CCD consumption (82,5 ± 13,7%). Although BEC had a greater impact on the parameters of dehydration on the BCC,
physiologically it has proven to be safe when added to athletes’ beverages.
consumption of a caffeinated sports drink (CSD) and of a commercial carbohydrate drink (CCD) on soccer players’ hydration balance. In one game they ingested CSD, and in the other CCD, consuming 5 ml.kg-1 of body weight (BW) 20 minutes before the game started, and 3 ml.kg-1 of BW at 0, 15, 30 e 45 minutes after the beginning of the game. The test used is “t” Student paired to verify the differences between periods and before and after treatment. ANOVA Two Way was used with for repeated measures supplemented by the Tukey post hoc test. Study treatments differed significantly; CSD led to greater rates of body weight loss, dehydration degrees, relative dehydration, absolute dehydration, and sweating. There was no statistical difference in the amount of urine eliminated during the game. CSD ingestion led to significantly lower fluid replenishment (75,0 ± 13,3%) than CCD consumption (82,5 ± 13,7%). Although BEC had a greater impact on the parameters of dehydration on the BCC,
physiologically it has proven to be safe when added to athletes’ beverages.
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