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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2018 March;177(3 Suppl 1):9-15

DOI: 10.23736/S0393-3660.17.03715-9


language: English

Mechanisms for effective adaptation of oxygen transport system in accomplished ski racers

Anastasiya BAKHAREVA , Alexander ISAEV

Institute of Sports, Tourism and Service, South Ural State University, Chelyabinsk, Russia


BACKGROUND: Local regional muscle endurance is improved due to development of capacity of muscle cells and their mitochondria for extraction of larger amounts of oxygen from the incoming arterial blood. Our research dedicated to this phenomenon has revealed that the maximum effect for high sport performance is possible if training process includes exercises aimed at enhancing local regional muscle endurance. The objective of the research was to reveal markers and mechanisms of effective adaptation of the cardiovascular system in ski racers showing different levels of performance at various stages of training.
METHODS: 27 participants of the research were recruited among 18-23-year-old ski racers and divided into 2 groups (12 and 15 people) by the level of performance based on the current ranking of skiers by Cross-Country Skiing Federation of Russia. Research methods included the study of cardiohemodynamics parameters using MARG 10-01 diagnostic system and non-invasive blood tester. Statistical processing of the research data was performed using Statistica 10.0, SPSS 17 software based on key methods.
RESULTS: The obtained results suggested that wave regulation in the system of oscillatory processes had the essential impact on functioning of peripheral vessels and larger filling with the blood; it was also established that such regulation required less cardiac energy expenditure. For instance, by the contest period the peripheral hemodynamics index in the less accomplished ski racers dropped by 366% (P<0.001) while this indicator in the leaders increased by 38.2% (P<0.001). The high level of sport performance was also seen from the correlations between athletes’ rankings and the indicator of life sustenance energy expenditure (r=-0.53, P<0.05).
CONCLUSIONS: Considering the variety of individual physiological processes in the oxygen transport system activity influenced by endurance training we studied the effective mechanisms of elements of adaptation in ski racers at rest. The obtained data suggested that wave characteristics (amplitude and frequency) of pulsatile arterial and venous blood flow (pressure) were essential for the circulation system functioning and for the high sport performance.

KEY WORDS: Pressure - Dilatation - Blood circulation - Transferrin - Cystatin C

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