title: [Dynamic characteristics of the external respiratory function in young men of the north in the annual cycle].
abstract: The annual cycle in young men (19.0 +/- 0.9 years), inhabitants of the European North (62 degrees) were studied: peak (PVR) and the instantaneous volumetric rate at the time of expiration 25, 50, 75% of forced vital capacity (FVC), average volume rate during exhalation from 25 to 75% FVC, respiration rate, time to attain the PRV and FVC. Indicators of lung function were determined on microprocessor spirograph SPM-01-R-D. Revealed that young men in the annual cycle significantly (F-test) changed only the speed characteristics of respiratory function, time function had no significant differences. Also is revealed a more variation in the annual cycle of values of speed parameters of lung function compared with those for the inhabitants of middle latitudes, indicating that the adaptive responses of lung function and certain restriction ofbronchial permeability on the level of medium and especially small bronchi. The peak and the instantaneous volumetric rate at the time of expiration 25, 50 and 75% FVC and the average volumetric expiratory flow rate in the range of 25 to 75% of forced vital capacity of lungs from male northerners in the cold season more, in warm weather--less.
authors.forename: N G
authors.initials: NG
authors.lastname: Varlamova
authors.forename: V G
authors.initials: VG
authors.lastname: Evdokimov
authors.forename: O V
authors.initials: OV
authors.lastname: Rogachevskaia
authors.forename: E R
authors.initials: ER
authors.lastname: Boĭko
mesh_terms: D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D015656:Respiratory Mechanics / Q000502:physiology*; D012426:Russia; D012621:Seasons; D055815:Young Adult