Bakhareva N.S. 
Kuban State Medical University, Krasnodar 

Turovaya A.Yu. 
Kuban State Medical University, Krasnodar 

Chernyshev A.I. 
Kuban State Medical University, Krasnodar

Keywords: morphometric parameters, proper heart rate, body surface area.

Introduction. Somatotypological characteristics are a "selective factor" in the sports selection of individuals in early adolescence [3]. The importance of choosing early adolescence for monitoring lies in the fact that in this age period there is a transition from childhood to adolescence [2].
The purpose of the study was to study gender differences in morphometric parameters, the proper number of heartbeats, and the level of stress experienced by people in early adolescence living in the Krasnodar Territory.
Methodology and organization of research. 52 adolescents of early adolescence (average age 13.1+0.1 years) were examined. Each subject's height (p, cm), body weight (m, kg) were measured, followed by the determination of body mass index (BMI), and proper heart rate (BPH, min‑1) according to the formula: BPH = 48*(p/m)1/3, where p is height, m isbody weight [1]; body surface area (S) according to the formula: S=(HnMn)1/2165.7 [1]; stress level (UIS) according to the formula: UIS = 0.000126·Rp·HR·M1/3 [1]. The digital material was processed by the method of variation statistics in the framework of the Microsoft Excel program. The differences were considered significant at p<0.05, i.e. in cases where the age differences exceed 95%.
The results of the study and their discussion. The statistical analysis made it possible to establish the presence of significant differences in the values of morphometric parameters: body weight between groups of boys (52.56 ±1.02 kg) and girls (49.34±0.99 kg); height between groups of boys (160.24±1.10 cm) and girls (155.84±0.96 cm), body surface area between groups of boys (15109.95±181.6 cm2) and girls (14532.94±183.34 cm2). As a result of the conducted studies, there were no significant differences in the average values of the indicators of the proper heart rate (BMI), body mass index (BMI), and the level of stress under test (UIS). An inversely significant relationship was found between heart rate and body surface area (r= – 0.90).
Conclusions. Gender differences in morphometric parameters have been established in people of early adolescence living in the Krasnodar Territory. There were no gender differences in early adolescence in terms of the proper number of heartbeats and the level of stress under study.

References

1. Galenko-Yaroshevsky, P. A. (Ed.). (2012). Antianginal drugs: Physiological and molecular pharmacology, strategy and tactics of clinical application. Prosveshchenie-Yug.
2. Baibakov, S. E., Bakhareva, N. S., Sheikh-Zade, Y.-R., & Chuprunova, N. S. (2014). Morphometric determination of gender differences in human physique. Morphology, 2, 63-66.
3. Nikolenko, V. N., Nikityuk, D. B., & Klochkova, S. I. (2017). Somatic constitution and clinical medicine. Practical Medicine.