The study of the relationship between physical development and cardiorespiratory fitness in male children and adolescents aged 9-17 years

А. Аликей, Svetlana Otaraly, Assyltek Malkey, Meleksha Myrzaev, Jardembek Kabylkhan

2026

Closed access Metadata (CSL-JSON)
DOI 10.48114/2306-5540_2026_1_84
Data confidence 70 medium
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

The aim of the study is to identify the orientation and degree of interrelationships between the indicators of physical development and cardiorespiratory endurance of male children aged 9-17 years. The anthropometric profile of the study participants was assessed by the following indicators characterizing the physical development of children and adolescents: height, weight, waist circumference, body fat percentage at two points on the body (in the triceps and subcapular region), body mass index and waist-to-height ratio. Cardiorespiratory endurance was assessed by us based on the results of the "20 m progressive shuttle run" test. As a result of the study, we did not receive unambiguous confirmation of the relationship between indicators of physical development and cardiorespiratory endurance. We found this dependence only in the age periods from 9 to 12 years, as well as from 16 to 17 years. In these age groups, physical development indicators such as weight, BMI, waist circumference, waist-to-height ratio, and body fat negatively correlated with the results of the progressive 20 m shuttle run, such as the number of stages, number of shuttles, distance traveled, total running time, and VO2 max.