Why does a person shiver in the cold?
When the body temperature drops below normal, the body activates the “shivering” mechanism so that the muscles quickly contract and generate heat.
Adenosine triphosphoric acid (ATF), which is the only source of energy in the body, breaks down during cooling. The cells then immediately release energy that they use to carry out vital processes, including the contraction of muscle cells.
In this way, about 45% of the energy obtained from the breakdown of ATF is used directly for contraction, and 55% enters the blood in the form of heat.
The body automatically turns on the “shivering” mechanism, and the person, in turn, involuntarily starts moving to warm himself by waving his hands or jumping.