This is a change in the type of activity, for example, after a long standing or sitting, it is necessary to do minimal physical exercises, after mental exertion – to run, swim, ride a bicycle. In this case, various groups of neurons will be involved, some of them will be able to rest, and the state of the nervous system directly affects muscle performance and mental capabilities.
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.