Behavior of skin temperature during a half-marathon in a hot environment under solar radiation
DOI:
https://doi.org/10.11606/issn.1981-4690.v35i3p43-50Keywords:
Race, Physiological stress, ExerciseAbstract
The objective is to evaluate the skin temperature (ST) in different regions during a half-marathon in a hot environment under solar radiation. The study was carried out in 10 runners aged 33.40 ± 10.04 years, weight of 66.40 ± 9.15 kg, height of 1.71 ± 0.06 m, and VO2peak of 58.57 ± 5, 47mL.kg¹.min¹. The 21km run was carried out on a predetermined route, with an ambient temperature of 27.96 ± 1.70ºC, relative air humidity 76.88 ± 7.49% and Globe and Wet Bulb Temperature Index of 25.80 ± 1.18ºC. The ST measurements were measured before, every 3 km and at the end of the race. For all tests, the level was P <0.05, for comparisons between moments, the one-way ANOVA test was used, with Tukey's post hoc. The average running time and pace were 101: 00 ± 9: 52 minutes and 4: 48 ± 00: 16 min • km-1, respectively. It was observed that the temperature of all skin regions was reduced by 1.35 ± 1.75 °C throughout the race, the temperature of the top of the head was the lowest 31.2 °C ± 2.11 °C and that of the forehead was the highest 33.7 ± 1.35 °C. In our study, the ST decreased, however, the magnitude of the reduction is different, due to the particularity of each region assessed, either by blood flow, number of sweat glands, density of the glands or by exposure to radiation.
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