思春期前児童・若年成人・高齢者の寒冷血管拡張反応

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The present study was attempted to examine whether the cold-induced vasodilation is affected by maturation and aging. Twelve prepubertal boys (10-11 yrs), 15 young men (18-26 yrs), and Solder men (66-78 yrs) immersed their middle finger in ice-water for 15 min under air condition of 27℃ and 40% RH. Before the immersion, no age-related differences were observed in skin temperature of middle finger (T_<fin>). The time required for the first rise of T_<fin> after the immersion (TTR) was significantly longer in the older men than in the boys and young men. T_<fin> at the first rise after the immersion (TFR), highest value of T_<fin> after the first rise (HST) and the mean value of T_<fin> during the immersion (MST) were significantly lower in the boys than in the young men. The integral value of T_<fin> from the onset of cold-induced vasodilation to the end of the immersion (CIVD_<index>) was significantly lower in the boys and older men than in the young men. TTR, TFR, HST, MST, and CIVD_<index> did not correlate significantly with maximal oxygen uptake, mean skinfold thicknesses at seven body sites, and length and girth of the middle finger. Oral temperature (T_<or>) did not change between before and after the immersion regardless of age, although the T_<or> in the boys was signifi cantly higher than in the young and older men. There were no age differences in the relationship of thermal sensation or pain sensation and T_<fin>. These results suggest that boys and older men have inferior cold-induced vasodilation compared to young men, and that the mechanisms of inferior cold-induced vasodilation are different in these two groups.
日本体力医学会の論文
2002-05-25

思春期前児童・若年成人・高齢者の寒冷血管拡張反応

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