Accession Number:

AD0257954

Title:

CHAMBER COLD ACCLIMATIZATION IN MAN

Descriptive Note:

Corporate Author:

ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s):

Report Date:

1961-05-19

Pagination or Media Count:

20.0

Abstract:

Nude subjects were exposed 8 hrs daily for 31 days to a temperature of 11.8 C during March. Other subjects were acclimatized similarly to a temperature of 13.5 C in September. At intervals during the exposures, measurements were made of shivering, 02 consumption, rectal and skin temperatures during a 2 hr cold exposure. Shivering decreased significantly in both groups by the 14th day heat production was unchanged in the winter group, but decreased significantly in the summer group. Basal metabolism rate BMR did not change in either group. Rectal temperature in both groups was unchanged for 10 days, but decreased after the 14th day. On the basis of shivering and rectal temperature changes, it was concluded that man can be artificially acclimatized. Failure of cold-elevated metabolism to decrease in the face of significant decrease in shivering indicates the presence of nonshivering thermogenesis in man.

Subject Categories:

  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE