Body TemperatureBody Temperature RegulationTemperatureMusclesCold TemperatureHot TemperatureMuscle ProteinsSkin TemperatureMuscle, SkeletalMuscle, SmoothHypothermiaThermometersMuscle Fibers, SkeletalFeverMuscle, Smooth, VascularMuscle ContractionHibernationMuscle DevelopmentTelemetryShiveringThermographyMuscle FatigueCircadian RhythmMuscle Fibers, Fast-TwitchMuscle DenervationTime FactorsMuscle Fibers, Slow-TwitchSciuridaeMyocytes, Smooth MuscleMitochondria, MuscleOculomotor MusclesNeck MusclesMuscle, StriatedMuscle SpindlesMuscle RelaxationThermogenesisRespiratory MusclesPapillary MusclesMuscle WeaknessHeat Stress DisordersSweatingThermometryEnergy MetabolismHumiditySeasonsElectromyographyHypothermia, InducedHeatingOxygen ConsumptionMotor ActivityAbdominal MusclesAntipyreticsRabbitsQuadriceps MuscleMuscle CellsKineticsImmersionAdaptation, PhysiologicalRats, Sprague-DawleyMasseter MuscleFacial MusclesMasticatory MusclesPyrogensHydrogen-Ion ConcentrationRectumIntercostal MusclesHeart RateIsometric ContractionModels, BiologicalPreoptic AreaMuscular AtrophyThermosensingMolecular Sequence DataRespirationIncubators, InfantRats, WistarCalciumBody WeightSatellite Cells, Skeletal MuscleHeat StrokePhysical ExertionBehavior, AnimalEatingBasal MetabolismHypothalamusPectoralis MusclesAnalysis of VarianceWaterCells, CulturedThermodynamicsDose-Response Relationship, DrugMuscular DiseasesInfrared RaysMice, Inbred C57BLElectric StimulationSleepThermoreceptorsHyperthermia, InducedPsoas MusclesN-Methyl-3,4-methylenedioxyamphetamine