Bed RestHead-Down TiltWeightlessness SimulationEmploymentCareer MobilityWomen, WorkingWeightlessness CountermeasuresPhysicians, WomenRestJob DescriptionQuestionnairesCardiovascular DeconditioningExercise TherapyExerciseTime FactorsSpace FlightBedsDietWeightlessnessWorkloadGreat BritainProspective StudiesOrthostatic IntoleranceTreatment OutcomeOccupational DiseasesRisk FactorsFamily PracticeLower Body Negative PressureEnglandCross-Sectional StudiesBed OccupancySupine PositionMuscular AtrophyEarly AmbulationMuscle, SkeletalPlasma VolumeHypotension, OrthostaticHypovolemiaVascular CapacitanceAmino Acids, EssentialImmobilization