ersion makes only 150% (8 and 20). The data on the figure show that indices of respiratory rate minimum and maximum values at rest have the trend to quantitative decrease with the age increase. Their dispersion percent index is reduced as well: for example, minimum (13) and maximum (35) values of respiratory rate at rest in the 8-year-old children differ from each other by 169.2%. By 20 years of age the aforementioned data disp