AcclimatizationAltitudeAdaptation, PhysiologicalMountaineeringAltitude SicknessCold ClimateAnoxiaPulmonary VentilationBoliviaCold TemperatureCarbon DioxideAdaptation, OcularAtmospheric PressureSweatingAtmosphere Exposure ChambersOxygenAdaptation, BiologicalPhosphofructokinasesOxygen ConsumptionTime FactorsTemperatureAcid-Base EquilibriumRespirationCarotid BodyAnthozoaCyprinidaeSocial AdjustmentSeasonsHypocapniaBody Temperature RegulationHearing AidsHot TemperatureChemoreceptor CellsRespiratory MechanicsBody TemperaturePulmonary Gas ExchangeClimate ChangeBlood Gas AnalysisDark AdaptationHeart RateFishesPartial PressureStress, PhysiologicalLactic AcidEnergy MetabolismRisk AdjustmentMuscle, SkeletalAdaptation, PsychologicalPhysical ExertionHematocritAnalysis of VarianceHydrogen-Ion ConcentrationHemoglobinsBody WeightAdjustment DisordersChronic DiseaseBlood PressureExercise TestRisk FactorsAcetylcholinesteraseAcute DiseaseBrainRats, Sprague-DawleyNorepinephrineCerebrovascular Circulation