PMID: 16617206Apr 18, 2006Paper

Seasonal variations of physiological characteristics and thermal sensation under identical thermal conditions

Journal of Physiological Anthropology
Noriko Umemiya

Abstract

Seasonal variations of human thermal characteristics were inspected in thermal comfort and when constantly indoors. Metabolic rate, tympanic temperature, skin temperature, body fat, body weight and thermal sensation were measured under identical thermal conditions in a chamber over the course of one year. Experiments were carried out for each subject in both summer and winter. Six subjects were measured 35 times in summer and 45 times in winter. one subject was measured weekly for 14 months. Measurements for analyses were taken 40-60 min after entrance into the chamber. Results revealed the following. 1) For all subjects, the metabolic rate, tympanic temperature and body fat were lower in summer than in winter; thigh skin temperatures were higher in summer than in winter. The averaged individual ratio of seasonal difference was 11.9% for metabolic rate, 14.9% for body fat, 1.8% for thigh temperature and 0.53% for tympanic temperature. Seasonal differences of about 10% in metabolic rate were maintained in this study. 2) Seasonal variations of the variables were examined for phase relationships against the outdoor temperature. 2-1) Metabolic rate, thermal sensation, body weight and body fat changed in reverse phase, whereas skin ...Continue Reading

References

Jan 16, 1998·International Journal of Biometeorology·S Aizawa, H Tokura
May 1, 1964·Journal of Applied Physiology·N L RAMANATHAN

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Citations

Jul 18, 2009·European Journal of Applied Physiology·Roy J Shephard, Yukitoshi Aoyagi
Sep 25, 2007·Journal of Nutrition for the Elderly·Maria G GrammatikopoulouIoannis Kapsalis
Sep 30, 2010·The Tohoku Journal of Experimental Medicine·Tatsuhiko SuzukiKenichi Kida
Jul 24, 2008·Journal of Clinical Biochemistry and Nutrition·Chizuko MaruyamaTeruichi Shimomitsu

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