ACUTE PHYSIOLOGICAL RESPONSES TO “RECOVERY INTERMITTENT HYPOXIA” IN HIIT

ABSTRACT Introduction: Traditional intermittent hypoxia training improves sport performance after short periods of exposure, but acute exposure to leads decreased intensity and technical quality. The solution overcome these negative effects may be perform efforts in normoxia the intervals between hypoxia, maintaining quality benefits hypoxia. Objective: This study aimed evaluate physiological responses during recovery high efforts. Materials methods: Randomized, one-blind, placebo-controlled study. Sixteen men performed a graded exercise test determine their maximal two sessions high-intensity interval training. could (HRT), FIO2: 0.136 or (NRT), 0.209. During two-minute ten one-minute efforts, peripheral oxygen saturation (SpO2), heart rate (HR), blood lactate ([La]), glucose ([Glu]) were constantly measured. Results: There differences HR (TRN = 120 ± 14 bpm; TRH 129 13 bpm, p < 0.01) SpO2 96.9 1.0%; 86.2 3.5%, 0.01). No [La] [Glu] TRN (4.4 1.7 mmol.l-1; 3.9 0.5 mmol.l-1) (5.2 2.0 4.0 0.8 mmol.l-1, 0.17). Conclusion: possibility including only as an additional stimulus training, without decreasing was evidenced. Level Evidence II; Randomized Clinical Trial Minor Quality.