Evaluation of the degree of dehydration after a test performed in a hot environment by cross-training practitioners
Abstract
Objective: To examine the hydration and dehydration responses during a session of Cross-training performed in a warm environment. Materials and Methods: 10 men (28.4 ±4.7 years; 79.5 ±6.6 kg; 25.8 ±1.49 kg/m2) participated in the study, with a minimum experience of 12 months on Cross-training, weekly frequency of training five days a week and with no history of injuries in the last six months. All volunteers performed a training protocol at Cross-training called “Murph”. Body mass, color and specific gravity of urine (GEU) were assessed before and immediately after. Body mass was used to calculate the% dehydration rate % weight loss and sweating rate. The environmental variables: room temperature, globe temperature, relative humidity and the Wet Bulb Index (IBUTG) were also monitored. Results: The “Murph” protocol was completed in 97.8 ±12.4 min, all volunteers performed the exercise protocol simultaneously, under the same environmental conditions. The volunteers showed an increase in urine color from 3.30 ±1.77 to 5.60 ±1.17 (p=0.002), with an effect size classified as large. In addition, a reduction in% dehydration and% body loss was observed 1.28 ±0.40% and 1.20 ±0.39% respectively and an increase in the total sweating rate of 4.66 ±1.57 g/m2/min. Conclusions: A “Murph” protocol session in a hot environment can contribute to dehydration in cross-training practitioners.
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