The feeling of fatigue in the afternoon is one of the brightest manifestations of our civilization. As you know, a person's working capacity for a whole day is not a gift for everyone, because 90% of adults in developed countries suffer from the problem of chronic fatigue.
The working capacity of the organism reflects the potential ability of a person to do some work in a certain period of time. There are such types of working capacity as: physical and mental. The physical working capacity of a person is mainly determined by the activity of the muscular and nervous systems, and the mental performance is due to the neuropsychic sphere. Sometimes mental working capacity is still understood as the concept of mental working capacity. It is a person's ability to perceive and process information, not allowing failures, to maintain your body's ability in a certain mode.
Physical and mental performance deteriorates under the influence of both the external environment and the change in the internal state of a person. Emotional and bodily (somatogenic) factors affect both mental and physical performance.
The state of working capacity depends on the proper functioning of its rhythms (intramuscular dynamics, daily and weekly dynamics).
Intraspinal dynamics of working capacity
The initial phase of this rhythm is the phase of development. In the first minutes of work, the effectiveness and efficiency of work are gradually increased. With physical labor, the development occurs faster than with mental working capacity, and is about 30-60 minutes (for a mental one, from 1.5 to 2 hours).
The phase of steady working capacity. In this phase, the state of systems and organs reach the highest level of efficiency. The phase of decline. In this phase, gradually working capacity decreases and fatigue develops. This stage develops in one hour or half an hour before the end of the first half of the shift.
If the lunch break is properly organized, then after its completion all phases of this rhythm are repeated: working, maximum working capacity and its fall. In the second part of the shift, maximum performance is usually lower than in the first shift.
Daily working capacity
In this cycle, working capacity is also not characterized by constancy. In the morning hours, working capacity reaches its maximum by 8-9 hours. In the future, it maintains high rates, only decreases from 12 to 16 hours. Then there is an increase, and after 20 hours decreases. If a person has to stay awake at night, then his working capacity at night is significantly understated, because in 3-4 hours it is the lowest. Therefore, working activity at night is not considered physiological.
Weekly dynamics
On the first day after rest, on Monday, working capacity is minimal. In the following days, work capacity increases, reaching its maximum by the end of the working week, by Thursday (Friday), and then again decreases.
Knowing about these changes in the rhythm of efficiency, it is advisable to plan the performance of the most difficult work in the period of maximum performance, and the most simple - during the rise or decline. After all, health and efficiency are closely interrelated.
Important for maintaining and at the same time increasing the level of mental and physical performance is the use of health and hygiene measures, which include a reasonable combination of rest and work, staying in the fresh air, normalizing sleep and eating, abandoning bad habits and sufficient motor activity.
Do not forget that maintaining your state of health at the highest level, you make it easier for your body to withstand various mental stresses, stresses and at the same time achieve planned things much faster than being fatigued.