INTRODUCTION: Some authors point out the oxygen mixtures most efficient use during the maximum and submaximal loads. However, among the researches there is no consensus about the oxygen support effectiveness before exercises (Sperlich B.,et al, 2011). The purpose of this study was to determine the effect of hyperoxic gas mixture with an oxygen content of 93% on the organism functional state and the athletes' performance during the maximum test. METHOD: The study involved 95 different sports male athletes; qualifications of the sports category II to the master of sports, aged 18 - 20. To evaluate the athletes performance is used incremental treadmill test (Premier-4 PROF). The athletes' respiratory system functional, blood pressure, heart rate variability, oxygen saturation were determined before and after test. Before the second test athletes breathed a hyperoxic gas mixture containing 93% oxygen with a portable oxygen concentrator for 10 minutes (Air Sep Life Style, USA), production 5 l/min. RESULTS: After a breathing hyperoxic gas mixture at 1st category skiers decrease in heart rate, DP and MBP unchanged SV are observed. HRV analysis showed that 1st category skiers after inhalation oxygen mixture tendency to displacement of autonomic balance towards predominance of parasympathetic autonomic regulation. HRV higher quilification skiers are characterized by steadiness to hyperoxic gas mixture. After hyperoxic gas mixture breathing skiers with moderate prevalence of an autonomous contour of regulation increased aerobic performance: V AeT increased (p <0,05), t Ae (p <0,05), AnT (p <0,001), decreased t An (p <0,001). At the same time there was a decrease HRmax, the central regulatory mechanisms exertion (Amo, p <0,05). Skiers with a marked predominance of an autonomous contour of regulation showed a lower efficiency, which is associated with a high activity of the parasympathetic division of the autonomic nervous system. DISCUSSION: The urgent adaptation features of the athletes cardio respiratory system to the hyperoxic gas mixture effects determined by the training process and the vegetative regulation type. Among the athletes with different types of vegetative regulation greatest sensitivity to the higher oxygen content in the breathing mixture showed skiers with moderate prevalence of a regulation autonomous contour. CONCLUSION: It was found the hyperoxic mixture has a positive effect on the functional state, increasing the reserve abilities athletes respiratory system and body adaptation. The oxygen support at a maximum load increases athletes aerobic capacity, anaerobic power and performance efficiency. The sport qualification and autonomic nervous system activity in rest were individuallytypological features the athletes cardiorespiratory system urgent adaptation to hyperoxia. --- The hosting University of Jyväskylä is planning to publish conference proceedings "Science and Nordic Skiing III". In case you are interested in this publication please contact the editors (Anni Hakkarainen anni.s.j.hakkarainen@jyu.fi) to become registered for the book.
© Copyright 2015 3rd International Congress on Science and Nordic Skiing - ICSNS 2015. 5-8 June 2015, Vuokatti, Finland. Published by University of Jyväskylä; University of Salzburg. All rights reserved.