The increasing intensity of competitive activity and the modem sports identifies the effective means and methods need to increase the athlete`s efficiency and full recovery. The fast recovery capacity in the short rest periods between the races is one of the decisive factors determining the high achievement. Hyperoxia (HO) (i.e. inhalation of air containing a higher partial pressure of oxygen (p02) than ambient air) is widely used as an enhancing function and sports performance means, and shorter recovery after loads (Stellingwerff, Glazier et al. 2005; Suchy, Heller et al. 2010; Sperlich, Zinner et al. 2011; Koriagina, Reutskya et al. 2015). Some authors point out the oxygen mixtures most efficient use during the maximum and submaximal loads (Richardson, Grassi et al. 1999). However, among the researches there is no consensus about the oxygen support effectiveness before exercises. The oxygen exposure physiological mechanisms on the functional performance at different exercises are not fully disclosed. The hyperoxic gas mixtures effectiveness data in the sport are ambiguous and contradictory. The purpose of this study was to determine the effect of hyperoxic gas mixture with an oxygen content of 93% on the functional and sports performance during the maximum test. (Original introduction)
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