Muscle RelaxationMuscle, SkeletalMuscle, SmoothMusclesMuscle ContractionRelaxation TherapyMuscle, Smooth, VascularMuscle ProteinsMuscle Fibers, SkeletalVasodilationMyostatinNitric OxideMuscle DevelopmentRelaxationAcetylcholineMuscular AtrophyIsometric ContractionTracheaCyclic GMPMuscle StrengthVasodilator AgentsNitroprussideMuscle FatigueSarcopeniaEndothelium, VascularQuadriceps MuscleTime FactorsMitochondria, MuscleElectromyographyElectric StimulationNitroarginineDeuteroporphyrinsExerciseBiological FactorsPenisDose-Response Relationship, DrugHSP20 Heat-Shock ProteinsResistance TrainingRabbitsRats, Sprague-DawleyAorta, ThoracicMuscle TonusCalciumGuinea PigsNeuromuscular BlockadeNeuromuscular Nondepolarizing AgentsHindlimbOxadiazolesMuscle Fibers, Fast-TwitchNitric Oxide DonorsIsoproterenolPhysical EnduranceMuscle DenervationGuanylate CyclaseNitric Oxide SynthaseNG-Nitroarginine Methyl EsterMuscle Fibers, Slow-TwitchAortaOpossumsVasoactive Intestinal PeptideMyocytes, Smooth MuscleMyocardial ContractionCyclic GMP-Dependent Protein KinasesRats, WistarCreatineEnzyme InhibitorsHypertrophyAnal CanalMagnetic Resonance SpectroscopyGlycogenPapillary MusclesNitroglycerinPhenylephrinePhysical ExertionPenile ErectionDogsMesenteric ArteriesArginineRegional Blood FlowVasoconstrictionBlood PressureNeck MusclesOculomotor MusclesMuscle, StriatedVasoconstrictor AgentsSignal TransductionBromcresol GreenHeart RateAndrostanolsElectric Stimulation TherapyOrgan SizeAdrenergic beta-AgonistsQuinoxalinesLegAdaptation, Physiologicalgamma-CyclodextrinsAgingInsulinMuscle Relaxants, CentralMuscle Spindles