CHANGE IN COLD-INDUCED VASODILATION DURING PHYSICAL TRAINING
10.7600/jspfsm1949.32.1
- VernacularTitle:運動鍛練と寒冷血管反応
- Author:
MASASHI SUGAHARA
;
MASASHI NAKAMURA
- Publication Type:Journal Article
- From:Japanese Journal of Physical Fitness and Sports Medicine
1983;32(1):1-7
- CountryJapan
- Language:Japanese
-
Abstract:
The cold-induced vasodilation (CIVD) was measured of 30 male university students who were daily engaged in three or four kilometers running, a rubdown with a dry towel and sports activities (trained group), and of 20 male university students who were hardly doing any physical exercise (untrained group) . Measurements were made five times in spring, summer and autumn in 1976 and in winter and spring in 1977. The results were summarized below:
1. The mean skin temperature (MST) and the temperature at first rise (TFR) were higher and the time of temperature rise (TTR) was earlier in the trained than in the untrained. This trend of difference between the two groups was particularly remarkable in summer, autumn and winter. MST was high in summer and low in winter, and this seasonal variation of MST was in conformity with that of the previous reports. The variation of the index of MST, TFR and TTR well conformed with that of temperature before water immersion (TBI), supporting the reasonability of Nakamura et al's rating method.
2. The resistance index (RI) was higher in the trained after summer and was significant in winter and spring of the following year. The increase of RI in one year was as significant as 18% in the trained while it was only 2% in the untrained. The seasonal variation of RI showed a two-peak behavior, high in summer and winter and low in spring and autumn.
The above differences of CIVD scores between the trained and the untrained indicate that physical training is useful for resistivity against cold.
