S-Space College of Human Ecology (생활과학대학) Dept. of Textiles, Merchandising and Fashion Design (의류학과) Theses (Master's Degree_의류학과)
Effects of Cross-Adaptation and Aging on Heat Tolerance of Haenyeo during Passive Heating
노화와 교차적응이 수동적 서열환경에서 해녀의 내열성에 미치는 영향
- 생활과학대학 의류학과
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 의류학과, 2016. 2. 이주영.
- Korean haenyeo had been well-known for their unique adaptation to cold exposure, diving into cold sea water even in winter with wearing thin cotton-suit. Not onlycross-adaptationaleffect of cold exposure but also repetitive swimming could affect the heat tolerance of haenyeo despite the development of wetsuit.
Heat tolerance induced by passive heat stress was examined through evaluating perspiratory and thermoregulatory responses. In a climate chamber where the air temperature was maintained at 28oC and the relative humidity at 50% RH, total 28 subjects (10 older haenyeos, 8 older females and 10 young females) immersed their leg under knees in 42oC hot tub for an hour. It was showed that haenyeos had the highest total sweat rate and maintained their sweat glands function. The heart rate was significantly lower than the other two groups and blood pressure was as low as young females.
These results suggest that lifetime-cold exposure of haenyeos had affected their heat tolerance positively by cross-adaptational effect and underwater swimming reduced the effect of aging on cardiovascular health.