The influence of training loads on the various systems of the body
Higher control center of locomotor activity are located in the cerebral cortex and the nerve cells that directly control the functioning of the muscles, in the brain spinal.
The nervous system performs three main tasks. First, the harmonization and coordination of different parts of the body and combining them into a single unit. Secondly, initiation and management of reactions of the
organism as a whole in response to changes both internally and in the external environment. Thirdly, the nervous system is the carrier of the psyche. The nervous system also plays a Central role in the habituation of the human body to the training loads.
During physical stress, the nervous system directs the work of the muscles, activating the necessary muscles to the extent appropriate and optimal length, at the same time ensuring consistency in the work of various muscles and muscle groups. Higher control center of locomotor activity are located in the cerebral cortex and the nerve cells that directly control the functioning of the muscles, in the brain spinal.
Any long muscles work is unthinkable without the purposeful reorganization of the work of the whole organism. In implementing the reorganization of the nervous system is also of great importance. One of the primary tasks of physical work – meeting the increased demand of muscles for energy. For this purpose, the nervous system causes specific changes in the endocrine system. The change in the concentration of various hormones in the blood is the use of energy reserves of the body to provide muscle performance. Hormonal shifts play an important role in the regulation of water balance during physical work. The greatest importance in the regulation of endocrine system is charac-tion in the depths of the brain structure of the hypothalamus.
Muscles work is unthinkable without the activation of the respiratory system and the heart in accordance with the intensity of tension.
Fatigue is an important protective mechanism, eliminating excessive waste of resources of the organism. The emergence and worsening of the condition of fatigue during is controlled by the nervous system, but cause fatigue and changes in working muscles.
More or less serious physical work also implies a deliberate reorganization for the distribution of blood flow between different tissues and organs. The main centres for the management of these functions are located in the part of the brain called the oblong brain. The location of the medulla oblongata in the nervous system is such that it represents the connecting link between the higher parts of the brain and spinal cord. Changes in the functioning of the body during physical work compared to the rest happen either under direct control of the nervous system, either under her control, but with the mediation of the endocrine system.
In connection with the increase in the intensity of metabolic processes and energy metabolism during physical work in the body in accordance with the intensity of work increases also the heat. To maintain a stable body temperature, which is important from the point of view of ensuring the health, activates the thermoregulatory system of the body. The main control centre and the regulation of body temperature is the hypothalamus.
To ensure efficiency it is necessary to increase the intensity of all of the above systems. To find opportunities with limited resources, it is necessary to slow down the operation of systems of organs, the importance of which in the adaptation to acute stress is secondary. This explains the inhibition of the functioning of the nervous system during physical work. The functioning of the digestive system is mainly under the control of the autonomic nervous system.
During physical work sooner or later the fatigue, which in the case of continued stress can lead to exhaustion. Fatigue limits our performance and often causes negative emotions. But the biological fact fatigue is an important protective mechanism, whose task is to prevent the excessive spending of the resources of the body, dangerous for the future of its existence. Fatigue is a complex phenomenon in scientific terms, only studied. And yet it is clear that occur during physical work, tiredness caused by changes in at least two levels in the nervous system and in working muscles. Occur during physical work fatigue is an important biological protective mechanism, whose main task is to prevent excessive waste of the resources of the organism. Weariness caused and exacerbated by work-related changes in the nervous system, and muscles. From changes associated with the nervous system, a well-known link between the disruption of nerve impulses from the nerve and the muscle cell