Bed RestBedding and LinensHead-Down TiltHousing, AnimalWeightlessness SimulationBedsWeightlessness CountermeasuresRestCardiovascular DeconditioningSpace FlightAnimals, LaboratoryWoodWeightlessnessOrthostatic IntoleranceAnimal HusbandryPaperLower Body Negative PressureSudden Infant DeathFloors and FloorcoveringsMitesMite InfestationsPyroglyphidaeAnimal WelfareRodent DiseasesPhysiciansMedical Staff, HospitalClothingBed OccupancyEnvironment, ControlledDustProne PositionVentilationHumidityTime FactorsPhysician-Patient RelationsSupine PositionMuscular AtrophyPlasma VolumeEarly AmbulationExerciseFadrozoleMuscle, SkeletalRefuse DisposalHypotension, OrthostaticWaste ProductsCyperaceaeAttitude of Health PersonnelTextilesPeromyscusHypovolemiaFamily PracticeInfant EquipmentSleepVascular CapacitanceZea maysAmino Acids, EssentialDairyingImmobilizationManureOncogene Proteins v-fos