There are many activities that require intense physical effort that is required to work shifts.By proper organization of labor based on ergonomic principles, through the mechanization and computerization of activities and by determining how many staff structure it can act effectively to reduce physical exertion.
In the public relations services or Secretariats exist elements that an important contribution to increasing mental effort. In this sense dialogue is particularly noted to be maintained by each person to determine the desired information. In order to meet that demand, usability studies indicate a number of qualities that must have workers from such a service, namely: good knowledge in the field of applied art of talking to people, dynamism, attention to distributive , sense of observation capacity of decision and initiative.Practice has shown that in the public relations services there are a number of cases which usually leads to overload. They are diverse and can be caused either by workers or customers. The first type is the degree of fatigue of workers (plus the accumulated daily) with implications on how to behave towards clients, lack of courtesy,manifested by nervousness.
People who do not have a fixed schedule and working in shifts are more susceptible to diabetes, become obese or have heart problems because of metabolic disturbance.
According to a study made by Harvard University of USA it has observed that shift program makes us sick. In this study 10 students were volunteers, five girls and five boys, who for two weeks worked eight hours shifts each , including night shifts.
It was noted that in this short time, students have shown signs of increased stress had similar problems in people who are prone to diabetes and had disorders of blood circulation.
These health problems are common in people who work in shifts as a program because their metabolism is disturbed and the body functions are themselves affected.
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