Muscle RelaxationMuscle ContractionMuscle, SkeletalMuscle, SmoothMusclesRelaxation TherapyIsometric ContractionMuscle, Smooth, VascularMuscle ProteinsMuscle Fibers, SkeletalVasodilationNitric OxideMyocardial ContractionMyostatinMuscle DevelopmentAcetylcholineRelaxationTracheaMuscle FatigueElectric StimulationElectromyographyCyclic GMPVasodilator AgentsMuscle StrengthCalciumMuscular AtrophyNitroprussideGuinea PigsUterine ContractionEndothelium, VascularDose-Response Relationship, DrugRabbitsAorta, ThoracicMuscle TonusTime FactorsNitroarginineQuadriceps MuscleRats, Sprague-DawleySarcopeniaMitochondria, MuscleVasoconstrictionExercisePenisBiological FactorsDeuteroporphyrinsHSP20 Heat-Shock ProteinsResistance TrainingIsoproterenolHindlimbPhenylephrineMuscle Fibers, Fast-TwitchRats, WistarNeuromuscular BlockadeOxadiazolesAortaPhysical EnduranceNG-Nitroarginine Methyl EsterVasoconstrictor AgentsNeuromuscular Nondepolarizing AgentsNitric Oxide DonorsNitric Oxide SynthaseMuscle Fibers, Slow-TwitchDogsEnzyme InhibitorsMuscle DenervationMesenteric ArteriesMyocytes, Smooth MuscleNorepinephrineGuanylate CyclasePapillary MusclesPotassium ChloridePhysical ExertionVasoactive Intestinal PeptideOpossumsAnal CanalGlycogenCyclic GMP-Dependent Protein KinasesCreatineHypertrophyRegional Blood FlowNitroglycerinBlood PressurePenile ErectionBiomechanical PhenomenaArginineMuscle SpindlesMagnetic Resonance SpectroscopyMembrane PotentialsHeart RateGastric FundusIndomethacin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidSignal TransductionAdrenergic beta-AgonistsLegNeck MusclesAdaptation, PhysiologicalQuinoxalinesNeuromuscular JunctionOculomotor Muscles