Effects of Air Temperature and Clothing on Thermophysiological Responses and Thermal Comfort Vote during Rest and Physical Exercise Kazuyo TSUZUKI (HA

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1 Effects of Air Temperature and Clothing on Thermophysiological Responses and Thermal Comfort Vote during Rest and Physical Exercise Kazuyo TSUZUKI (HAYAKAWA), Norio ISODA* and Takuko YANASE* Fellow of the Japan Society for the Promotion of Science for Japanese Junior Scientists, The Institute of Public Health, Minato-ku, Tokyo 108 * Faculty of Home Economics, Nara Women's University, Nara 630 This study was experimentally investigated in order to clarify effects of air temperature and clothing on thermophysiological responses and thermal comfort vote during rest and physical exercise. The experiments were carried out in a climate chamber at Nara Women's University at different air temperatures from 15 to 30 Ž and in 3 types of clothing conditions. Nude: half naked (bathing bra and panties), Half: a half-sleeved cotton T-shirts, cotton shorts, bathing bra, panties and cotton socks, Long: a long-sleeved cotton sweater, cotton trousers on the Half type ensemble. The relative humidity was 50%. The mean radiant temperature was equal to the ambient air temperature, and air velocity was less than 0.2 misec. The subjects were three healthy untrained young women. They rested for 30 min and then took physical exercise on a bicycle ergometer for 40 min. The results were as follows: (1) The more the clothing insulation increased, the higher the mean skin temperature became. (2) The thermal sensation vote changed to the hotter side with increasing of the air temperature and the clothing insulation. The positive relations between mean skin temperature and thermal sensation vote were significantly observed during rest and 25 W exercise. The thermal neutral votes during rest and 25 W exercise, respectively, were 26 and 21.5 Ž in Nude, 24.5 and 20.5 Ž in Half, 21.5 and 18.5 Ž in Long. (3) The relation between do values and air temperatures in the thermal neutrality was compared with that obtained from the do formula by Winslow et al. (1949). (Received May 7, 1990)

2 Table 1-1. Experimental conditions of thermal condition, activity and clothing Table 2. Physical characteristics of subjects Table 3. Voting scale Table 1-2. Combination of air temperature and clothing

3 Table 4. Experimental schedule Fig. 1. Change of rectal & skin temperatures, thermal sensation vote and comfort vote

4 Fig. 3. Relation between air temperature and heart rate Fig. 2. Relation between air temperature and rectal & mean skin temperature Fig. 4. Relation between air temperature and body weight loss

5 Fig. 5. Temperature distribution from human body to air through clothing in chest and forearm with LONG-SLEEVES Fig. 6. Relation between air temperature and thermal sensation vote

6 Fig. 7. Relation between mean skin temperature and thermal sensation vote Fig. 8. Relation between air temperature and comfort vote

7 Table 5. Direct evaluation of effective clothing insulation on the sensible heat transfer of sedentary subject with LONG- SLEEVES, TA=20 Ž, V ƒ0.2 m/sec Fig. 9. Relation between clothing insulation and thermal neutral temperature Table 6. Direct evaluation of effective clothing insulation on the sensible heat transfer

8 5) Nevins, R.G.: ASHRAE Trans., 72, 283 (1966) 9) Rohles, F.H., J.E.Woods, and R.G.Nevins ASHRAE Trans., 79, 71 (1973) 15) Hardy, J.D. and DuBois, E. F.: J. Natur., 15, 461 (1938) 17) Fanger, P.O.: Thermal Comfort, Aarhuus Stiftsbogtrykkerie, A/S (1970) 22) Olesen, B.W.: ASHRAE Trans., (1985) 23) Nishi, Y., R.R.Gonzalez, and A.P. Gagge: ASHRAE Trans., 81, 183 (1975) 24) Winslow, C.E.A. and Herrington, L.P.: Temperature and Human Life, Princeton Univ. Press, Prince-

Vol. 51 No (2000) Thermo-Physiological Responses of the Foot under C Thermal Conditions Fusako IWASAKI, Yuri NANAMEKI,* Tomoko KOSHIB

Vol. 51 No (2000) Thermo-Physiological Responses of the Foot under C Thermal Conditions Fusako IWASAKI, Yuri NANAMEKI,* Tomoko KOSHIB Vol. 51 No. 7 587-593 (2000) Thermo-Physiological Responses of the Foot under 22-34 C Thermal Conditions Fusako IWASAKI, Yuri NANAMEKI,* Tomoko KOSHIBA and Teruko TAMURA * Junior College Division, Bunka