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THE PNNX HEART RATE VARIABILITY IN YOUTHS UNDER SUBMAXIMAL ERGO CYCLE TESTING

A. L. POKHACHEVSKIY (1), A. B. PETROV (2) - 1ACADEMY OF THE FPS OF RUSSIA, RYAZAN, RUSSIA 2 -LESGАFT NATIONAL STATE UNIVERSITY OF PHYSICAL EDUCATION, SPORT AND HEALTH, SAINT-PETERSBURG, RUSSIA

Objective: to identify the physiological patterns of early heart rate (HR) adaptation reactions under submaximal ergo cycle testing. Materials and Methods: high school students and college students under 23 years old: 1st group – active athletes of endurance sports (n=22); 2nd group – sedentary youths (n=18). We studied the pNNx heart rate variability under submaximal ergo cycle testing. Non-parametric methods were used for data analysis.
Results: the pNNх markers of HR variability and performance were defined. The pNNх decreases with the increase of the HR in the athletes group. Based on our data the best markers for HR variability are: pNN5, pNN10. They can be used as criteria for assessment of physical work capacity and level of fitness. Perspectives for further research of HR variability are specified.
Conclusions: the pNNх markers can be used as criteria for assessment of physical work capacity and level of fitness.
Keywords: 
hear rate variability; submaximal testing; performance indicators.