swimmingTravel swimmers in the water is accompanied by a significant resistance of the medium (up to 10 -13 kg) and requires a lot of muscle work, dramatically increasing with increasing speed. Swimmers have good physique, moderately, but harmoniously developed muscles. Well developed when swimming, the organs of respiration; increases the power of the respiratory muscles, overcoming when inhaling the water pressure in the chest, and when exhaling into the water - resistance. Horizontal body position in the water and equal participation in many muscle groups facilitate the activities of the organs of blood circulation. This, in particular, makes it possible for a long swim in the calm pace and for the elderly. Beneficial effect on the nervous system and the General condition of the body has when swimming aquatic environment (see Hydrotherapy), and when swimming in the outdoor pools, in addition, exposure to sunlight and air. Great practical importance swimming increases its value in physical education of youth. To teach children to swim with 5-6 years. More rational sports ways of navigation.
Sports games are a special large group of kinds of sports (see Sports games).

The following methods of swimming: crawl, brass, Dolphin, on the back. Purpose of the voyage - regular, moderate physical exercise, alignment function of the nervous system and metabolism, as well as the harmonious development and hardening of the whole organism. When swimming receive significant load all the muscle groups of the limbs and trunk. As a result, the swimmers are proportions of body shapes. Especially favorable impact swimming provides on the respiratory system: energetic breath is performed through the mouth and exhale into the water. During inhalation of respiratory muscles overcome water resistance, receiving an additional burden, and during exhalation in water, which is denser than air, environment, work hard expiratory muscles. This leads to improved mobility of the chest and increase lung capacity, reaching swimmers higher among athletes averages - 5-6 L. Swimming causes a significant increase of pulmonary ventilation. Maximum oxygen consumption during swimming with maximum speed is 5-5,5 l/min
Swimming strengthens the nervous system, tones it gives a sense of vigor, strength and cheerfulness. However, when swimming big load falls on kidneys (protein in the urine, increasing in comparison with other types of sports activities, the selection of lactic acid). High requirements to the system of thermoregulation of the body. Under the influence of stay in water significantly increase metabolism and energy expenditure, mainly because of the large heat loss. In water, the body loses more heat than in the air at the same temperature; energy consumption increases even more and at competitions can reach an extremely high level.
Under the influence of regular activities in the basin (see swimming Pools) increases the body's resistance to cold and to changes in the weather. This involved swimming fewer colds, improved regulation. However, intensive sports training without proper medical supervision can lead to significant fatigue sometimes to decrease the immune resistance of the organism.
Swimming is one of the few sports in which high sports results can be shown in an earlier (compared to other sports) age (15-18 years). Swimming lessons in the preparatory group of children's sports schools is already possible with 6-7 years, and in the main groups with 11-12 years.
Recreation purposes swimming can be recommended to elderly and old age, leading insufficiently active way of life, or persons daily activities are associated with a higher voltage of the nervous system.