Swimming in the pool.

 If water temperature is 15-20C, swim in his you can till a first visiting sauna-room, and if to swim in the pool as warmed good, you can cold  caught from unaccustomed. As after strong warming, organism perceive such swimming a strong over cooling. And a most save if in pool temperature 4-10C, such cold water a guarantee, that  you are staying in pool for short time. An ideal variant is half minutes, but to rise on 2 min  ,but in a good warming in Steam-room  and  hardening, after pool need to warm in sauna for 2 min.And hard cold procedures doing after 2 visits in sauna room, and procedure time depending from your weight. A harder person ,thus his fat layer is fatter, thus a more time the ability  staying in cold water. Reaction organism on the swimming as on an  other cold procedures are having of two phases is first cooling and active warming.

First phase on she is having 2 min, narrowing vessels for skin, blood sticky to organs,rising pressure, breath is deep.

Second phase calling is all organism all activity warming, rising body temperature, skin is red, staying warm and soft.