Effect of a hot and humid environment on rat (A) body weight and (B) food consumption. Data are presented as the mean ± standard deviation (n=8). *P<0.05 and **P<0.01 vs. before the experiment. ∆P<0.05 and ▲P<0.01 vs. SHR-CN; ★P<0.01, SHR-24 vs. SHR-8; +P<0.01 vs. WKY. WKY, Wistar-Kyoto rats; SHR, spontaneously hypertensive rats; CN, control; −8, heat exposure for 8 h; −24, heat exposure for 24 h.