FEATURES OF EXTERNAL BREATH SYSTEM REACTION (RESPONSE) TO LOCAL COOLING OF HAND AND FOOT SKIN IN YOUNG ABLE-BODIED PERSONS

Abstract

Changes of static and dynamic indicators of the external breath function during local cooling of the hand and foot skin in 30 young men and 30 girls aged 18-24 years which were born and constantly lived in the European North of Russia has been studied. The study was carried out with the ergospirometry system Oxycon Pro. At the initial stage, the indicators of functional state of external breath were estimated with the spirography. The following stage consisted of carrying out local cooling of the hand skin. The examinee put down a hand for 1 minute in a vessel with water which temperature successively was 24° С, 15° С and 8° С. Right after cooling repeated spirography was performed. The restoration interval between the tests was 25-30 minutes. In the same sequence, cooling of feet was carried out, and spirography was performed. It has been established that local cooling significantly influenced some indicators of external breath. Thus during cold impact on the skin peripheral thermoreceptors both of the hands and feet of the girls, a statistically significant increase in the respiratory minute volume (RMV) and respiratory rate (RR) indicators was observed, and in the young men, similar reactions were revealed only during feet cooling. During cooling of the young men's hands, only the RR value increased significantly, while the maximal breathing capacity (MBC) values and the breathing reserve (BR) values significantly decreased. Besides, a decrease in the RR indicators during cold impact on the foot skin in the young men was observed.