| Popis: |
Methods to improve athletic performance include the hypoxic and recently also the hyperoxic training. This study hypothesized that a combination of high intensity interval hypoxic training (HIIT) followed by a recovery in hyperoxia improves the aerobic endurance and oxygen transport parameters better than recovery in normoxia. Forty-nine fit men, 18-20y, were randomly divided into: Hypo+Hyper group (N=16) performing HIIT in hypoxia with 15min recovery in hyperoxia at FiO2=0.40 ; Hypo group (N=16) HIIT in hypoxia/recovery in normoxia and Control group (N=17) performing everyday activities. The intervention lasted 4 weeks ; 3x/week. Each week, the intensity was increased by 5%. HIIT in hypoxia exercise protocol consisted of six bouts of 1min at 80-95% of HRmax, each week at higher rate, respectively, followed by 2min at 60% of HRmax. Pre- and postintervention the blood was analyzed related to oxygen transport parameters and an all- out-treadmill test carried out. At maximal exertion Hypo-Hyper group had a larger increase in maximal oxygen uptake-VO2max, (pre- 49.34 and post- 50, 79ml/kgmin-1) as opposed to controls (pre- 48.04 and post- 46, 71ml/kgmin-1 ; p |
