Abstract

Background and objective

Warm exposure places high demands on thermoregulation mechanisms, which depend on the effectiveness of the microvascular function. The associations between the microcirculation and metabolism in warm environments have received little attention. The purpose of this study was to explore skin blood flow (SkBF) in response to food intake in a warm environment compared to control.

Methods

Thirty-two healthy, acclimated-to-warm-environment and physically active participants were recruited (20 females and 12 males). They participated in two sessions (warm environment: 31 °C and control: 20 °C, presented in randomized order). SkBF was measured before and after standardized food intake through the acquisition of perfusion signals by laser Doppler flowmetry (Periflux System 5000), following a local heating protocol.

Results

SkBF was affected by the environmental temperature, showing an increase in the warm environment compared to control (all p < .001). SkBF was significantly affected by food intake (all p < .007), being reduced after meals. In the men’s group, SkBF was reduced in both environmental temperatures after meals. In women, meals affected SkBF at 20 °C but not in the warm environment.

Conclusion

These results may indicate a competition between thermo- and glyco-regulation in a warm environment to the detriment of glucose homeostasis in women.

中文翻译：

---

温暖环境对皮肤血液流动对食物摄入的影响。

摘要

背景和目标

温热暴露对温度调节机制有很高的要求，这取决于微血管功能的有效性。在温暖的环境中，微循环与新陈代谢之间的关系鲜为人知。这项研究的目的是探索与对照组相比，在温暖的环境中响应食物摄入的皮肤血流量（SkBF）。

方法

招募了32名健康，适应温暖环境和身体活跃的参与者（20名女性和12名男性）。他们参加了两次会议（温暖的环境：31°C和对照：20°C，以随机顺序出现）。根据局部加热方案，通过激光多普勒血流仪（Periflux System 5000）获取灌注信号，在标准化食物摄入前后测量SkBF。

结果

SkBF受环境温度的影响，与对照组相比，温暖的环境有所增加（所有p  <.001）。进食后SkBF显着受进食量的影响（所有p  <.007），饭后降低。在男性组中，饭后两种环境温度下的SkBF均降低。在女性中，进餐会在20°C时影响SkBF，但在温暖的环境中则不会。

结论

这些结果可能表明，在温暖的环境中，温度调节和糖调节之间存在竞争，不利于女性体内葡萄糖的体内稳态。