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Normobaric hypoxic conditions corresponding to an altitude of 3,000 m (F i O2 = 14.5%) were simulated by diluting ambient air with nitrogen via a mixing chamber, with the dilution being constantly controlled by a P o 2 probe (Alti-Trainer 200, Sport and Medical Technology).ormobaric hypoxic conditions corresponding to an altitude of 3,000 m (F i O2 = 14.5%) were simulated by diluting ambient air with nitrogen via a mixing chamber, with the dilution being constantly controlled by a P o 2 probe (Alti-Trainer 200, Sport and Medical Technology).
Arterial oxygen saturation, systolic and diastolic blood pressure, and heart rate were measured during the normoxic and hypoxic/sham hypoxic periods. For each breathing cycle, changes from normoxia to hypoxia/sham hypoxia were calculated, and changes were averaged for each of the 15 sessions and for each week.