Accession Number : AD0663828

Title :   COLD ADAPTATION OF KOREAN WOMEN DIVERS.

Descriptive Note : Rept. no. 1(Final), Sep 66-Sep 67,

Corporate Author : YONSEI UNIV SEOUL (SOUTH KOREA) COLL OF MEDICINE

Personal Author(s) : Hong,Suk Ki

Report Date : DEC 1967

Pagination or Media Count : 25

Abstract : The metabolic and thermal responses were studied in six women divers (ama) and six non-diving women (control) during two hour immersion to water of 30, 31 and 33C. In addition, the regional heat flux and the limb blood flow were also measured by using Hatfield gradient calorimeter discs and mercury-in-rubber strain gages, respectively. At the end of two hour immersion, the maximal tissue insulation, as calculated by (rectal temp.-water temp.)/skin heat loss, was greater in the ama than in the control in both seasons when a comparison was made at a given subcutaneous fat thickness. However, the lower arm and finger blood flow at a given water temperature was greater in the ama than in the control, indicating that the elevation of tissue insulation in the ama is not due to a greater peripheral vasoconstriction. Although there were considerable individual variations, the skin heat flux from the limb at a given temperature was not much different between the two groups. In other words, the skin heat flux for a given blood flow was lower in the ama as compared to the control. Moreover, the occlusion of limb blood flow resulted in reductions of skin heat flux by the same magnitude in both groups. On the basis of these results, it is speculated that the ama do not develop vascular adaptation as such but seem to have an efficient counter-current heat exchanger. (Author)

Descriptors :   (*ACCLIMATIZATION, COLD WEATHER TESTS), ADAPTATION(PHYSIOLOGY), FEMALES, HUMANS, DIVING, ADIPOSE TISSUE, BLOOD VESSELS, BLOOD CIRCULATION, BODY TEMPERATURE, RESPONSE(BIOLOGY), METABOLISM, EXTREMITIES, HEAT PRODUCTION(BIOLOGY), SOUTH KOREA

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE