General provisions

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Performance of man - the concept is not unique. Depending on the initial position of its definition, there are different formulations of this concept. In broad terms, the efficiency is defined as the body's ability to do the job action. However, the ability to work depends primarily on preparedness, psychophysiological characteristics of the organism, the conformity of its physiological functions of the requirements of the profession, the degree of fitness of the organism K. execution of work, motivation to work, social, hygienic and emotional factors.
In the process of production activity is important not only potential, ability to work, but the degree of mobilization of health, which characterizes the actual working capacity of the person. Professional performance summarizes the physiological characteristics of the organism, age-related changes, the experience gained, the persistence of, and in connection with this professional endurance, adaptation to the work and its conditions (even, perhaps, adverse to the body) and a number of other social-hygienic factors, which for a long time associated with a particular employment or accompany her.
Professional performance should be viewed as the optimal degree of mobilization of physiological systems, aimed at achieving specific, the usual work at a voltage of certain functions, formed mainly under the influence of this work, conditions of work and age peculiarities of the organism. However it is known, that with increasing age decreases the level of individual psychophysiological indicators of performance.
With age narrowed of adaptive opportunities of an organism, which is related to complicated reconstructions physical and psycho-emotional shipments that accompany the aging process. Parallel to mobilise important adaptive mechanisms that support the activities of the body, and make you retain optimal proportions between the organism and the environment. Is not easy gradual fading functions, and a new, qualitatively different level of adaptations to the environment (D. F. Chebotarev, 1968; centuries Frolkis, 1970, and others).
In the process of ontogenesis in the complicated pattern of evolutionary and involutionary process is dominated by one, the other functions depending on the specific social conditions of human life and the state of its activity (employment, communicative, epistemological).
The health of the body belongs to the class of those physiological States that are self-regulation. We are talking about automatic controls for the return to the original value changes during the activities.
According to the theory of automatic control, there are stable and unstable self-regulating system. If the organism vital activity is regulated so that the observed constancy of the number of significant figures of the internal environment, then we say that "the body is a homeostatic system". However, those constants physiological processes that are characteristic of homeostasis healthy person alone, undergo changes at transition from rest to a specific type of activity. The level of these changes is largely dependent on age. People of different age identical shifts physiological functions when working uneven.
High efficiency and productivity during the working life are accompanied by changes of mechanisms of maintaining physiological functions at the required level.
The mechanisms of age-adaptive variability is closely connected with the changes of the higher nervous activity, affecting the level of efficiency. In particular, the mental workers reduced functional properties of cortical cells, weakening the main nervous processes, marked their stagnation and inertia, the difficult alteration conditional irritants, violated the conditioned reflex communications, reduced lability inhibitory and excitatory processes, both processes, particularly brake, characterized by pronounced inertia.
Research gerontogenesis allowed to determine that microevolution shifts can occur much earlier period of old age, and at the same time, in late ontogenesis is the development of individual intellectual functions (C. Paco, 1960: Jarvik et al., 1962; Owens, 1966, and others). Natural biological ageing within working age is not essential restrictions professional health in modern occupations.