5Rosch P J. Stress and memory loss: some speculations and solutions[J]. Stress Med, 1997, 13: 1-6.
6Davies J. Free radical and tissue damage produced by exercise [J].Biochem. Biophy Res Comm, 1952, 107: 1195-1205.
7Achmadi J, Yanagisawa T, Sano H, et al. Pancreatic insulin secretory response and insulin action in heat-exposed sheep given a concentrate or roughage diet[J]. Domestic Animal Endocinology, 1993,10(4): 279-287.
8Hendricks G L, Siegel H S, Mashaly M M. Ovine corticotropin-releasing factor increase endocrine and immunological activity of avian leukocytes in vivo[J]. Proceedings of the Society for Experimental Bidogy and Medicine, 1991, 196: 390-395.