Why is it better to play snowballs on a frosty day so as not to freeze than to stand motionless, even in a warm fur coat?

During active movements, different muscle groups contract rapidly, this requires energy generated by the oxidation of organic matter inside the muscle fiber. As a result, part of this energy goes to muscular work, and part turns into heat, warming a person.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.