Human thermoregulation

In thermoregulation, body heat is generated mostly in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles.

Occurrence of conditions too hot and humid for human life is expected to increase in the future due to global warming.

[3] In such environments, it helps to wear light clothing such as cotton, that is pervious to sweat but impervious to radiant heat from the sun.

Notably, a good level of fitness allowed the elderly people to cope better and offset somewhat the drop off to their ability to thermoregulate due to old age.

[15] However, extra body fat has been shown to offer some benefit in terms of keeping warm, especially during immersion in cold water.

This is not necessarily always the case though, and high levels of physical fitness can allow thinner swimmers to also perform effectively in cold water environments.

It has been suggested that adjusting the adenosine A1 receptor of the hypothalamus may allow humans to enter a hibernation-like state of reduced body temperature, which could be useful for applications such as long-duration space flight.

Before the chamber is heated, the patient is coated with a special kind of indicator powder that will change in color when sweat is produced.