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Application of the optical-sensor for human circulation and nervous system related to environmental and exercise adaptabilities

光学传感器在与环境和运动适应性相关的人体循环和神经系统中的应用

基本信息

批准号：
16207019
负责人：
KAWABATA Takashi
金额：
$ 16.97万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

Dehydration is known to affect thermoregulatory response and exercise performance. The maintenance of blood volume (BV) is an important factor for providing circulatory stability, thermoregulatory and maintaining performance during exercise. The fact that the BV associates with thermoregulatory responses and contributes to inhibition of hyperthermia in exercise has been reported by previous studies ([Convertino (1983)] ; [Fortney et al. (1988)] ; [Mack et al. (1994)]). It has been well known that Hypovolemia induced by thermal dehydration and progressive pooling of blood in cutaneous blood vessels in response to heat stress reduces the central circulating blood volume. Under these conditions cutaneous vasoconstriction leads to excessive heat storage in hot environment. Increases in sweat rate and skin blood flow during exercise in hot environment enhance heat dissipation and prevent hyperthermia. Hyperthermia itself has been suggested to limit aerobic performance ([Nielsen et al. (1993)]). Heat, exercise, mental stress or postural change, etc. as environmental factors in which the circulation dynamics is greatly changed were known well. Then, the small size and portable data logger the 14 hours continuous, high-speed sampling by 2.56kHz measurement was possible with optical-sensors, to analyze human adaptability was developed in this research. In addition, human adaptability to heat and exercise stress were examined by continuous and simultaneous measuring the skin blood flow and the pulse wave that was the index of the cardiovascular system with this device. As a result, the sympathetic nerve function was able to be evaluated from the measurement of the signal of the pulse wave included in the signal of skin blood flow, and human adaptability was able to be analyzed.

脱水会影响体温调节反应和运动表现。维持血容量（BV）是提供循环稳定、体温调节和维持运动表现的重要因素。BV与热调节反应有关，有助于抑制运动中的高温，这一事实已被先前的研究报道([Convertino (1983)]；[Fortney等人（1988）]；[Mack et al.(1994)]。众所周知，热脱水引起的低血容量和皮肤血管对热应激的进行性血池减少了中央循环血容量。在这种情况下，皮肤血管收缩导致在高温环境中储存过多的热量。在高温环境下运动时，出汗率和皮肤血流量增加，促进散热，防止体温过高。热疗本身被认为会限制有氧运动的表现（[Nielsen et al.(1993)]）。热、运动、精神压力或体位变化等环境因素对循环动力学的影响是众所周知的。在此基础上，研制了小型便携式数据记录仪，利用光学传感器实现了以2.56kHz测量频率连续14小时高速采样，分析了人体的适应性。此外，通过连续和同时测量皮肤血流量和脉搏波（心血管系统指标）来检测人体对热和运动应激的适应性。这样就可以通过测量皮肤血流信号中包含的脉搏波信号来评估交感神经的功能，并分析人体的适应性。