Ig. Khaliulin et al., LIMITATION OF STRESS REACTION INTENSITY U NDER THE CONDITIONS OF OPEN-FIELD TEST THROUGH RATS ADAPTATION TO COLD-EXPOSURE AND EXERCISE TRAINING, Zurnal vyssej nervnoj deatelnosti im. I.P. Pavlova, 43(6), 1993, pp. 1218-1224
Male Wistar rats' adaptation to the periodical cold exposure (3 hours
daily, 6 times a week within 2 months at the air temperature of 1-2-de
grees-C) and to the exercise training (swimmimg 1 hour daily, 6 times
a week within 2 months at the water temperature of 32-33-degrees-C) wa
s resulted in a limitation of motional and vegetative manifestations o
f the stress reaction in the <<open field>> test. Activation of the st
ress limiting systems in the organism could be one of the main causes
of these adaptive effects. There was an elevation of beta-endorphin co
ncentration and that of the ratio <<prostacycline/thromboxane>> in som
e tissues of adapted animals.