External respiratory function in youth and girls in heat and cold

It is revealed that changes in external respiration function in youth and girls in cold indicate the inclusion of isolation and restrictive reactions of respiratory tracts, allowing to keep the optimal conditions of low-temperature airconditioning. In youth and girls breathing by cold air reduces lung capacity, increases Tiffno index. In youth in cold the forced expiratory volume for the first second is reduced, the peak expiratory rate and the velocity of air flow in bronchial tubes of large caliber decreases. In healthy man when breathing in cold the dynamic characteristics of external respiratory function most often change, whereas volume indicators change to a lesser degree.