Psycho-physiological aspects of health

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In older age groups change the blood supply and innervation of the muscular system, reduces elektrovozoremontnij muscles, changes the nature of their bioelectric activity. According to I. Century Muraveva (1969), when comparing the average value of total bioelectric activity with the amount of work performed investigated when dosed muscle load, reveals clearly marked reduction of this quantity per unit of work done. Consequently, improves with age "use" the muscles of nervous tension. Between growth rates of performed work and the value of spending bioelectric activity there is an inverse correlation (r = -0,77).
Important characteristics of muscle health are the length and nature of the recovery period after exercise. About during the recovery process usually judged on the performance of the rest. At an older age at regular, non-excessive working in parallel with a decrease in muscle health, an increase of restorative actions of the rest. This action is mostly not the intensification of the processes of functional recovery, and with the change in the regulation of motor function, which thanks to the intervention of the braking process limits the continuation of the work early, low-manifestations of fatigue (B. N. Zamostyan, 1963).
Age-related changes in motor functions are also manifested by the reduction of power, speed and endurance. At various forms of physical activity in different individuals swiftness and strength are characterized by the pronounced inequality that depends largely on the functioning of the nervous centres and peripheral nerves that ultimately determines the peculiarity and speed of a nerve impulse. Endurance with age also decreases, however, this reduction does not correlate with the force (centuries of Rosenblat, 1975).
Various parameters characterizing muscle performance, with age did not change synchronously. Most of all reduced the speed of the motor reactions, to a lesser extent indicators muscle strength; the amount of the performed work are reduced significantly less. The efficiency of recovery of muscle health with age, practically does not decrease.
During aging is formed different mechanism of regulation of motor function. However, it is important to increase protective role of the process of the Central braking as a factor ceasing work for fatigue (B. N. Zamostyan, 1969). Therefore, in ontogenesis muscle function is undergoing significant changes. Given these, one can more fully understand the causes and mechanisms of the shifts taking place in other organs and systems. Close functional relationship motor and autonomic functions determines the peculiarities of metabolism, activity of the Central nervous system, cardiovascular and respiratory systems, functional activity of other internal organs.
During many years of work, the constant practice that is associated with a complex of purposeful movements, execution of work is automated and when working medium (optimal-individual) intensity creates the most favourable conditions, in which achieved the highest productivity with relatively minimal fatigue. When more intensive work force and the amount of muscle tension decrease parallel to the degree of intensity of work. Long workout at peak load increases not enough power or frequency of contractions, how many duration of their work. Close correlation between the main parameters characterizing the muscular system, as well as training, lasting physical work and its voltage resulted in widespread use of research of this system to determine the health of physical labor.