Every time after the end of the work day, many people begin to understand that not all tasks were successfully completed, and each time they give their word that tomorrow everything will be different. They promise themselves that they will enthusiastically take action, and they will not waste any time in vain, and mentally they are building grandiose plans for the effective use of their working time.

The state of fatigue associated with the performance of labor duties, very often arises as a result of insufficient clear planning of the working day or with various voluntary and involuntary deviations from a well-designed plan. Fatigue leads to a decrease in productivity.

An employee who does not take into account the need to constantly take into account the effectiveness of working hours, loses him for various reasons, both external and internal, during the working day, and then trying to catch up, starts to work at an accelerated pace, which leads to a rapid fatigue.

A busy schedule and low efficiency of working hours are the most likely causes of overwork at work.

Overwork, in contrast to chronic fatigue, is a pathological condition. It develops under the influence of prolonged fatigue, which actually is the main trigger mechanism. But the symptoms of fatigue are not only due to the loss of energy resources of the body, but most as a result of persistent disruption of the central nervous system. The processes of excitation and inhibition of neurons of the brain lose their systematic and periodicity, we can say that the ultra-phase of excessively prolonged inhibition occurs in the cerebral cortex after the excitation phase. In the phase of inhibition, which lasts much longer than the excitation phase, fatigue, inactivity, apathy, delayed and mild reaction in response to stimuli, and in the excitation phase, there are single paradoxical bursts of activity during the periods of morning awakening or evening rest.