In the course of the trainings the human body loses about then a lot of liquid. As a result, there is a feeling of thirst. But many doctors and trainers do not advise to drink a lot of liquid right after performance of physical exercises.
Instructors and trainers often forbid the wards to drink liquid right after the trainings as water is quickly soaked up in blood, thereby increasing its volume, and, as a result, complicating work of already loaded heart. As one more reason for refusal of water and any other liquids after physical activities the fact that during physical activity the accent of the general activity of all organism is transferred to muscles acts. Kidneys and digestive system (stomach) are in ""sleep mode"". Having drunk a glass of water, you thereby will force them to work strongly that will affect the general health and will slow down restoration after the training. If the person actively does sports and drinks water, kidneys begin to function on a limit of the opportunities, and there is a water delay in an organism. It promotes lowering of the level of sodium which is necessary for normal functioning of internals. Cases when the marathoners who drank 2-3 liters of water right after the running were hospitalized with a sharp renal failure are known. It is impossible to drink cold or ice water during the trainings at all and also after several hours after them. Remember anatomy of internals: the stomach is located directly under heart. The cold water getting to it promotes reflex narrowing of warm vessels, breaking coronary blood circulation and slowing down intake of nutrients in a cardiac muscle. It can lead to serious diseases of a cardiovascular system. Probability also to ache with a tonsillitis as on condition of the lowered immunity the drunk cold water in the state excited after the training, is capable to lead to inflammation of the upper airways, and sometimes and lower (pneumonia) is high.