Relaxation TherapyMeditationMuscle RelaxationMusclesMuscle, SmoothMuscle, SkeletalMuscular Dystrophy, DuchenneMuscle ContractionMuscle, Smooth, VascularMuscle Fibers, SkeletalMyositis, Inclusion BodyMuscle ProteinsDystrophinMuscle WeaknessMuscular DystrophiesMuscular Dystrophy, AnimalMuscular AtrophyMice, Inbred mdxMuscular DiseasesNitric OxideVasodilationMuscle DevelopmentMuscle FatigueTracheaCyclic GMPDeuteroporphyrinsMuscular Atrophy, SpinalAcetylcholineHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNitroprussideNeuromuscular Nondepolarizing AgentsElectric StimulationMuscle Fibers, Fast-TwitchRelaxationVasodilator AgentsIsometric ContractionMuscle DenervationPenisMuscle Fibers, Slow-TwitchMuscle TonusRabbitsCalciumGuinea PigsElectromyographyEndothelium, VascularDose-Response Relationship, DrugMyocytes, Smooth MuscleDisease Models, AnimalOpossumsMitochondria, Muscle