Different social and environmental factors over the past few years have had a negative impact on the health of the population and its adaptive capacity. Among the studied issues, constituting a social procurement, a special place is occupied by the problem of preserving the health of children, living in conditions of technogenic pollution of the environment. Growing organism under modern conditions is forced to stand against various factors, causing functional mismatch, among which there are

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... tain ecological living conditions. Therefore, the relevance of investigation the physiological systems, which provide the adaptation of the organism to changing environmental conditions, is quite obvious. We conducted the investigation of functions of the external respiration system and its response to the controlled physical activity in seven-year old girls, studying in the first grade of comprehensive school, living in different environmental conditions. Comparative analysis of the physical activity influence on the parameters of external respiration in 7-year-old girls, living in different environmental conditions, was carried out. In the process of the study it was found, that environmental pollution was one of the causative factors of reducing the parameters and adaptive capabilities of the external respiration system, in response to the controlled physical load, and the period of recovery of the studied parameters was lingering and uneven.