颤抖产热和体脂可保护身体浸入时的核心区域免受冷却，但在头部浸入时则不然：结构方程模型。

Shivering heat production and body fat protect the core from cooling during body immersion, but not during head submersion: a structural equation model.

机构信息

Max Bell Centre, University of Manitoba, Winnipeg, MB, Canada.

出版信息

Comput Biol Med. 2011 Mar;41(3):154-8. doi: 10.1016/j.compbiomed.2011.01.005. Epub 2011 Feb 3.

DOI:10.1016/j.compbiomed.2011.01.005

Abstract

Previous studies showed that core cooling rates are similar when only the head or only the body is cooled. Structural equation modeling was used on data from two cold water studies involving body-only, or whole body (including head) cooling. Exposure of both the body and head increased core cooling, while only body cooling elicited shivering. Body fat attenuates shivering and core cooling. It is postulated that this protection occurs mainly during body cooling where fat acts as insulation against cold. This explains why head cooling increases surface heat loss with only 11% while increasing core cooling by 39%.

摘要

先前的研究表明，仅头部或仅身体冷却时，核心冷却速率相似。对涉及仅身体或全身（包括头部）冷却的两项冷水研究的数据进行了结构方程建模。身体和头部的暴露都会增加核心冷却，而仅身体冷却会引起颤抖。身体脂肪会减弱颤抖和核心冷却。据推测，这种保护主要发生在身体冷却期间，脂肪充当了对寒冷的隔热层。这解释了为什么头部冷却仅增加 11%的表面热量损失，而核心冷却增加 39%。