Accession Number : AD0765930

Title :   Plasma Catecholamine Response to Exercise and Cold Adaptation.

Descriptive Note : Research rept.,

Corporate Author : DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)

Personal Author(s) : Chin,Alan K. ; Seaman,Roger ; Kapileshwarker,Moreshwar

Report Date : 16 OCT 1972

Pagination or Media Count : 5

Abstract : Male rats were administered light, moderate, and heavy exercise programs for 3 weeks. Following the exercise programs, the nonexercised control and the three exercised groups were administered a cold-tolerance test at -20C for 3 hr. At the end of 3 hr the mean colonic temperature of the nonexercised group was 31.9C while those of the exercised animals were 35.7-36.5C. All groups exposed to -20C showed significant increases in plasma norepinephrine, epinephrine, and cortico;terone when compared to a second nonexercised control group which was sacrificed at 25C (P < 0.01). Within the cold-exposed groups, the exercised animals exhibited plasma catecholamine and corticosteroid levels that were significantly lower than the nonexercised group (P < 0.01). The findings indicate that physical training enhances cold tolerance in rats. (Modified author abstract)

Descriptors :   (*AMINES, LOW TEMPERATURE), (*EXERCISE(PHYSIOLOGY), AMINES), ADAPTATION(PHYSIOLOGY), BLOOD PLASMA, TOLERANCES(PHYSIOLOGY), STRESS(PHYSIOLOGY), RATS, EXPERIMENTAL DATA, CANADA

Subject Categories : Biochemistry
      Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE