ABC | Volume 112, Nº5, May 2019

Original Article Gomes et al Thermoregulation in hypertensive rats Arq Bras Cardiol. 2019; 112(5):534-542 Figure 1 – Core temperature (Tcore, A), oxygen consumption (VO 2 , B) and tail skin temperature (T skin , C) during acute exercise, until fatigue. Control Wistar (C-WIS), trained Wistar (T-WIS), control SHR (C-SHR), trained SHR (T-SHR). Data expressed as mean ± SD; * p < 0.05: C-SHR vs. C-WIS; # p < 0.05: T-WIS vs. C-WIS; + p < 0.05: T-SHR vs. T-WIS. 44 42 40 38 36 55 50 45 40 35 30 25 20 15 36 34 32 30 28 26 24 Tcore (oC) VO 2 (mL.Kg. –0.75 .min –1 ) T skin (oC) 0 10 20 30 40 50 60 70 80 90 Time (min) C-WIS T-WIS C-SHR T-SHR A B C MRS) associated with higher heat production and dissipation. 7,8 It is worth pointing out that the age of the animals and the absolute running speed during the acute exercise protocol were different among these studies, which could explain this difference. Future studies should test other exercise intensities and duration, since the effects of training are known to be dependent on these variables. 21 In the present study, the intensity of acute physical exercise (60% of MRS) was established according to the American College of Sports Medicine recommendations. 22 It is of note that, during the acute exercise session, although the animals were subjected to the same relative exercise intensity, the absolute speed was higher in trained animals. Gant et al. 23 analyzed the relationship between Tcore and relative exercise 537