Partial reduction of parasympathetic nerve activity during sleep after endurance exercise under hypoxic conditions

Evening endurance exercise under hypoxic conditions did not exacerbate autonomic nerve activity during sleep compared to the same endurance exercise under normoxic conditions. However, despite different inspiratory oxygen levels during exercise (FiO2: 20.9% or 14.5%), evening endurance exercise may partially suppress parasympathetic nerve activity during sleep. These findings would apply to people who are involved in endurance exercise under hypoxic conditions.