Dehydration level and concentration of high-intensity physical activity practices
Abstract
Dehydration caused by high intensity physical activities, such as croosfit, impairs athletes performance. Increased acidity due to lactate accumulation contributes to athlete's fatigue. This study aimed to evaluate the dehydration and the relation between carbohydrate consumption and blood lactate level in high intensity physical activity. A total of 13 individuals completed a standard training called Open 16.5 of the CrossFit Games Open. Initially, anthropometric and dietary data were collected. On the training day, lactate level and dehydration were determined. Dietary data indicated low carbohydrate intake, with a mean daily intake of 2.6 ± 0.7 g of carbohydrate/kg of body weight, as well as high protein and lipid intake. The mean time of execution of the activity was 16.6 ± 3.6 minutes. Lactate presented a final mean of 9.6 ± 2.2 mmol/L, with a variation of 6.9 ± 2.5 mmol/L. The mean of dehydration rate was 394 ± 155 mL. Daily or pre-training carbohydrate intake did not correlate with levels of dehydration, lactate concentration or training completion time. Therefore, the present study did not observe correlation between carbohydrate intake and blood lactate level, however evidenced an important dehydration, despite a short training, reinforcing the need for correct hydration of the athlete.
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