Abstract
During a year (winter, spring, summer and autumn) the spirographic survey of one and the same group of healthy children (33 boys and 32 girls of primary school age, natives of Arkhangelsk) was conducted. It is established that in the period of transition from warm to cold season (autumn) children of 8-9 years old have increase in system functional capacities and the level of respiratory breathing. Reduction of IRV and increase of ERV in absolute indicators in comparison with proper values, as well as in relative indicators in relation to VC in all seasons of year was revealed.
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