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Heat and cold responses in prepubertal boys, older men and young women.

青春期前男孩、老年男性和年轻女性的热和冷反应。

基本信息

批准号：
10680066
负责人：
INOUE Yoshimitsu
金额：
$ 2.24万
依托单位：
Osaka International University for Women
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680066/
关键词：
Boys Older man Young women Cutaneous vasodilation Cutaneous vasoconstriction Sweating Heat stress Cold stress 性差発汗量皮膚温身体部位差

项目摘要

To examine heat loss effector function of prepubertal boys, older men and young women, their heat and cold response during a series of eight experiments were compared with the responses of young men. 1) The results of the 1ィイD1stィエD1experiment suggest that in older men the lower thigh sweating rate observed during the latter half of the 60-min heat test was possibly due to age-related modifications of peripheral mechanisms. 2)The results of the 2ィイD1ndィエD1 experiment suggest that heat tolerance and its improvement with acclimation are little impaired not only in highly fit older but also normally fit older men, when the subjects exercised at the same relative exercise intensity. 3)The results of the 3ィイD1rdィエD1 experiment indicate that the greater skin blood flow observed on the trunk in the boys may be due to a greater withdrawal of vasoconstrictor tone and a greater active vasodilation. 4)The results of the 4ィイD1thィエD1 experiment demonstrate that there are regional differences in both young and old men. 5)The results of skin blood flow(LDI) measurement on chest and thigh(6.25cmィイD12ィエD1by use of a Laser Doppler Imager, support our decrement may proceed from the lower limbs to the upper body. 6)The results of the 6ィイD1thィエD1 experiment suggest that women depend more than men on dry heat loss by greater cutaneous vasodilation(especially on the thigh)rather than wet heat loss by sweating. 7)The results of the 7ィイD1thィエD1 experiment demonstrate that the coldinduced vasodilation in the prepubertal boys and older men was weaker than that in the young men. 8)The results of the 8ィイD1thィエD1 experiment suggest that cutaneous vasoconstriction function decreased over 8 years in healthy active men in their sixth and seventh decades. Although the decreased function was compensated partly by the increase of metabolic heat production, aging led to a decreased ability to maintain core temperature.

为了研究青春期前男孩、老年男性和年轻女性的热损失效应器功能，将他们在一系列8个实验中的热和冷反应与年轻男性的反应进行了比较。1)第1天第1天第1天的实验结果表明，在老年男性中，在60分钟热测试的后半段观察到的大腿下部出汗率可能是由于与年龄相关的外周机制的改变。2)2周D1nd周D1实验的结果表明，当受试者在相同的相对运动强度下运动时，热耐受性及其随适应的改善不仅在高度健康的老年人中，而且在正常健康的老年人中几乎没有受损。3)第3天第1天第1天的实验结果表明，在男孩躯干上观察到的更大的皮肤血流量可能是由于血管收缩张力的更大撤回和更大的主动血管舒张。4)第4次重复D1实验的结果表明，年轻人和老年人都存在地区差异。5)用激光多普勒仪测量胸、大腿（6.25cm）皮肤血流量（LDI）的结果，支持我们的减少可能是从下肢向上身进行的。6)第6个月D1的实验结果表明，女性比男性更依赖于通过更大的皮肤血管扩张（特别是大腿）而不是通过出汗而失去的湿热。7)第7天第1天第1天的实验结果表明，青春期前男孩和老年男性的冷诱导血管舒张功能弱于青年男性。8)第8个月D1th月D1实验的结果表明，健康活跃男性在60岁和70岁时，皮肤血管收缩功能在8年内下降。虽然减少的功能部分地被代谢产热的增加所补偿，但衰老导致维持核心温度的能力下降。