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The purpose of this research is a comparative study of the functional activity of the cardiorespiratory system in primary schoolchildren (7–11 years old) located in different climatic and geographical zones of Andijan region of the Republic of Uzbekistan. The studies revealed that the vital capacity of lungs (l) in primary schoolchildren (7–11 years old) increases linearly in school sequences of desert, pre hilly, hilly and foothill climatic–geographical regions. The obvious difference in the values of this indicator was registered between schools #17 and #5, which are located in the desert and foothill zones, respectively, while in these schools, boys and girls have minimum–maximum values of lungs capacity (l) increased by 1.15–1.28 (1.26) va 1.2–1.39 (1.36). In studies at schools #17–, #26–, #30–, #4 and #5 for primary schoolchildren, the range of heart rate (times/min) for boys was 95–79; 93–79; 94–78; 93–80 and 94–82, respectively, and for girls – 93–82; 95–85; 94– 86; 93–85 and 87–85, respectively, while in both sexes in the range of 7–11 years, the heart rate decreases in a linear fashion. Also, for primary schoolchildren (7–11 years old) of secondary schools #17 and #5, in the desert and foothill climatic–geographical zones, the values of blood pressure indicators (systolic/diastolic), respectively, have a high value of 1.03/1.12 and 1.02/1.08. Impact Factor: ISRA (India) = 3.117 ISI (Dubai, UAE) = 0.829 GIF (Australia) = 0.564 JIF = 1.500 SIS (USA) = 0.912 РИНЦ (Russia) = 0.156 ESJI (KZ) = 5.015 SJIF (Morocco) = 5.667 ICV (Poland) = 6.630 PIF (India) = 1.940 IBI (India) = 4.260 Philadelphia, USA 287

teoretičeskaâ i prikladnaâ nauka

COMPARATIVE CHARACTERISTICS OF THE FUNCTIONAL ACTIVITY OF THE CARDIORESPIRATORY SYSTEM IN PRIMARY SCHOOLCHILDREN (ON THE EXAMPLE OF SOME DISTRICTS OF ANDIJAN REGION)