Effects of high ambient temperature and LBP intervention on the level of EPI (pg/ml) in the plasma of rats. Data are shown as mean ± standard deviation (n=8). *P<0.05 compared with CN. LBP, lycium barbarum polysaccharides; EPI, epinephrine; CN, control group; HT, high ambient temperature group; HTL, high ambient temperature + LBP group.