Introduction. It should be considered that the body constitution which is widely used in the preventive and clinical medicine, leaves an imprint on the body mass index. The objective of this work is to study the features of body mass index and fat body mass in females of different constitutional and age groups.

Materials and Methods. Using the method of complex anthropometry and bioimpedancometry (“Medass”), we have also studied the physical status of 580 ethnic Kyrgyz women living in Osh, Kyrgyzstan and its surroundings. Statistical data processing included the calculation of arithmetic mean and error, as well as the minimum and maximum of each indicator (variation amplitude). The significance of difference was assessed by Student’s t-test.

Results. The body length and weight and, accordingly, the body mass index, significantly depend on the type of body constitution. The absolute fat mass is also unequal in women of different constitutional groups. The minimum and maximum of the absolute and percentage fat mass in women of the period of adulthood II with different body constitutions are, in general, more than in juvenile period.

Conclusion. The obtained results can be used to develop measures aimed at the timely detection of overweight and obesity as well as for the implementation of measures to prevent alimentary-related diseases in juvenile and adulthood period. Somatometric assessment of the physical development can be used in the dynamic monitoring of health status in organized groups: in educational institutions, youth sports schools, enterprises.