Fatigue is a physiological condition, occurring due to intense or prolonged activities and reducing health. A certain degree of fatigue stimulates regenerative processes that the second and gradually increasing the load increases fitness and health. It is important to prevent excessive fatigue and overwork. Fatigue is primarily developed in various parts of the Central nervous system and first of all - in the cells of the cerebral cortex of the brain. Apparently, based on exhaustion of these cells is a violation of dynamic balance between the processes of excitation and braking.
While mental activities related to the constant changing of processes of excitation and inhibition centers of bark of the big hemispheres, fatigue develops relatively slowly.
Fatigue occurs faster in monotonous work (prolonged stimulation of the same nerve cells) and the absence of a compelling emotional motives. That is especially true when working on the Assembly line, where physically easy, repetitive and long work very quickly causes fatigue.
Fatigue in the muscular system occurs due to decrease in muscle energy substances (ATP glycogen) and accumulation of decay products (lactic acid).
Fatigue occurs much faster when static (associated with constant voltage) muscular activity than dynamic (voltage, alternating with the relaxation). Therefore static work should be alternated with dynamic, as well as with the rest.
Some features characterize the process of fatigue when working night shifts at plants and factories, during the harvesting campaign in agriculture , etc.
Work at night accompanied by a more significant nervous tension, compared with work in the daytime.
During harvesting a big load falls on the agricultural workers, when they, during several days of work without observance of the regime of work and rest.
Both physical and mental work we can not allow the transition of fatigue in pathological state - fatigue. Medical control, carried out for these purposes, should be considered as a subjective indicators (fatigue, discomfort), and a number of objective symptoms (pulse rate, blood pressure, changes in body weight and other).
Prevention. Introduction of Fizkultury, change operations during the day, lunch breaks, ventilation in the working premises, noise control, proper lighting, and rational device jobs reduce fatigue.
Prevention of fatigue when working night shifts includes the same events as you would during the day. In addition, the duration of working time night shifts reduced by 1 hour.
During harvesting, the health care worker should constantly monitor the sanitary condition of field camps, seeking their exemplary content to a brief interruption machine operators could receive a complete rest. All mills field must be equipped with shower installations, you must carefully keep track of calories and food taste, as well as for normal conditions for sleeping (no noise, clean linen, and so on). During your stay at field camps machine operators should undergo regular medical examinations, during which you should pay attention to both subjective complaints (feeling tired), and on objective measures (heart rate, blood pressure). Special attention should be paid to the health status of the elderly and very young age, as it is among these groups are most often recorded cases of severe fatigue and even diseases in the result of hard work.