Muscle RelaxationMuscle, SkeletalMuscle, SmoothMusclesMuscle ContractionRelaxation TherapyMuscle, Smooth, VascularMuscle ProteinsMuscle Fibers, SkeletalVasodilationMyostatinMuscle DevelopmentNitric OxideRelaxationAcetylcholineMuscular AtrophyIsometric ContractionTracheaCyclic GMPMuscle StrengthVasodilator AgentsNitroprussideMuscle FatigueSarcopeniaEndothelium, VascularMitochondria, MuscleQuadriceps MuscleElectromyographyNitroarginineElectric StimulationDeuteroporphyrinsBiological FactorsExercisePenisHSP20 Heat-Shock ProteinsResistance TrainingTime FactorsDose-Response Relationship, DrugAorta, ThoracicRats, Sprague-DawleyMuscle TonusRabbitsNeuromuscular BlockadeGuinea PigsCalciumNeuromuscular Nondepolarizing AgentsHindlimbOxadiazolesMuscle Fibers, Fast-TwitchNitric Oxide DonorsMuscle DenervationPhysical EnduranceIsoproterenolGuanylate CyclaseNitric Oxide SynthaseNG-Nitroarginine Methyl EsterMuscle Fibers, Slow-TwitchAortaOpossumsVasoactive Intestinal PeptideMyocytes, Smooth MuscleCyclic GMP-Dependent Protein KinasesMyocardial ContractionCreatineHypertrophyRats, WistarAnal CanalGlycogenEnzyme InhibitorsPapillary MusclesPhenylephrinePenile ErectionNitroglycerinMagnetic Resonance SpectroscopyPhysical ExertionMesenteric ArteriesDogsArginineVasoconstrictionRegional Blood FlowNeck MusclesOculomotor MusclesBlood PressureMuscle, StriatedVasoconstrictor AgentsBromcresol GreenAndrostanolsgamma-CyclodextrinsQuinoxalinesAdrenergic beta-AgonistsOrgan SizeAdaptation, PhysiologicalElectric Stimulation TherapyLegHeart RateMuscle Relaxants, CentralMuscle SpindlesSignal TransductionGastric FundusAging