Effects of exercise in normobaric hypoxia on hemodynamics during muscle metaboreflex activation in normoxia

AbstractPurposeLittle is known about the cardiovascular effects of the transition from exercise in hypoxia (EH) to normoxia. This investigation aimed to assess hemodynamics during the metaboreflex elicited in normoxia after EH.MethodsTen trained athletes (four females and six males, age 35.6  ± 8.4 years) completed a cardiopulmonary test to determine the workload at anaerobic threshold (AT). On separate days, participants performed three randomly assigned exercise sessions (10 min pedalling at 80% of AT): (1) one in normoxia (EN); (2) one in normobaric hypoxia with FiO2 15.5% (EH15.5%); and (3) one in normobaric hypoxia with FiO2 13.5% (EH13.5%). After each session, the following protocol was randomly assigned: either (1) post-exercise muscle ischemia after cycling for 3  min, to study the metaboreflex, or (2) a control exercise recovery (CER) session, without any metaboreflex stimulation.ResultsThe main result were that both EH15.5% and EH13.5% impaired (p 
Source: European Journal of Applied Physiology - Category: Physiology Source Type: research

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