Exercise TestPhysical FitnessMusclesExercise TherapyExerciseGenetic FitnessMuscle, SkeletalExercise ToleranceMuscle ProteinsMuscle, SmoothPhysical ExertionMuscle Fibers, SkeletalMuscle ContractionMuscle, Smooth, VascularMuscle DevelopmentOxygen ConsumptionMuscle FatiguePhysical EnduranceMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle DenervationMitochondria, MuscleMyocytes, Smooth MuscleQuadriceps MuscleRespiratory MusclesNeck MusclesTime FactorsHeart RateMuscle WeaknessOculomotor MusclesBicyclingMuscle Stretching ExercisesMuscle, StriatedMuscle SpindlesRunningMuscle RelaxationAdaptation, PhysiologicalRestResistance TrainingAbdominal MusclesIsometric ContractionPapillary MusclesElectromyographyLactic AcidAnaerobic ThresholdPhysical Education and TrainingGlycogenMuscle CellsLegMuscular AtrophyMasseter MuscleSelection, GeneticCardiovascular Physiological PhenomenaEnergy MetabolismFacial MusclesIntercostal MusclesPulmonary Gas ExchangeMasticatory MusclesMuscular DiseasesBlood PressureSatellite Cells, Skeletal MuscleBiological EvolutionRegional Blood FlowBreathing ExercisesAnalysis of VarianceMotor ActivityPectoralis MusclesAgingWeight LiftingHindlimbBody WeightMuscle StrengthBody CompositionWalkingMyofibrilsBiomechanical PhenomenaElectric StimulationSportsRespiratory Physiological PhenomenaInsulinReproductionOxygenBlood GlucoseMyosin Heavy ChainsErgometryMutationPsoas MusclesPhosphocreatineModels, BiologicalHeartRats, Sprague-DawleyRespirationTemporal MuscleCells, CulturedRabbitsDiaphragmCalciumRats, WistarCitrate (si)-SynthaseHemodynamics