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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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Marta CAMACHO-CARDEñOSA, Alba CAMACHO-CARDEñOSA, Ismael MARTíNEZ GUARDADO, Marta MARCOS SERRANO, Rafael TIMON, Guillermo OLCINA
Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
BACKGROUND: This pilot study had the aim to determine the effects of a new dose of maximal-intensity interval training in hypoxia in active adults.
METHODS: Twenty-four university student volunteers were randomly assigned to three groups: hypoxia group, normoxia group or control group. The eight training sessions consisted of 2 sets of 5 repeated sprints of 10 seconds with a recovery of 20 seconds between sprints and a recovery period of 10 minutes between sets. Body composition was measured following standard procedures. A blood sample was taken for an immediate haematocrit and haemoglobin concentration assessment. An all-out 3-ute test was performed to evaluate ventilation parameters and power.
RESULTS: Haemoglobin and haematocrit were significantly higher for the hypoxia group in Post- and Det- (p=0.01; p=0.03). Fat mass percentage was significantly lower for the hypoxia group in both assessments (p=0.05; p=0.05). The hypoxia group underwent a significant increase in mean power after the recovery period.
CONCLUSIONS: A new dose of 8 sessions of maximal-intensity interval training in hypoxia is enough to decrease the percentage of fat mass and to improve haemoglobin and haematocrit parameters and mean muscle power in healthy and active adults.