Muscle ContractionIsometric ContractionMuscle, SkeletalUterine ContractionMyocardial ContractionMuscle FatigueMuscle, SmoothIsotonic ContractionTendinopathyElectric StimulationElectromyographyMuscle StrengthCalciumExerciseVasoconstrictionElbowBiomechanical PhenomenaQuadriceps MuscleGuinea PigsTarsus, AnimalMuscle Fibers, SkeletalCreatine KinaseMuscle, Smooth, VascularMuscle RelaxationMusclesTime FactorsPhysical ExertionMuscular DiseasesKneeElbow JointPotassium ChlorideVolitionGastrointestinal MotilityAchilles TendonDose-Response Relationship, DrugTracheaResistance TrainingVasoconstrictor AgentsWeight LiftingStress, MechanicalPeristalsisRabbitsUrinary BladderNorepinephrinePhysical Conditioning, AnimalAcetylcholineRats, Sprague-DawleyRats, WistarMusculoskeletal Physiological PhenomenaAdaptation, PhysiologicalScotomaAtropineFixation, OcularPhenylephrineRecruitment, NeurophysiologicalMotor NeuronsCaffeineDogsVas DeferensThighSarcomeresHypertrophy, Left VentricularAthletic InjuriesIleumExcitation Contraction CouplingNifedipineLegAorta, ThoracicMuscle ProteinsTendonsMuscle TonusPatellofemoral Pain SyndromeExercise TherapyCarbacholAnkle JointPhysical EnduranceCreatine Kinase, MM FormHeart VentriclesPainTorqueCatsRunning15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidMyosin Light Chainsrho-Associated KinasesMovementMyofibrilsMuscle SpindlesMyocardiumSerotoninSprains and StrainsMyometriumCalcium Channel BlockersMesenteric ArteriesAction PotentialsHeartVentricular RemodelingMyosinsAortic Valve ProlapseAnalysis of Variance