PhosphocreatineMuscle ContractionDecerebrate StateReflex, StretchChloraloseReflexMuscle, SkeletalCatsMechanoreceptorsPhysical ExertionMagnetic Resonance SpectroscopyCreatineTendonsHeart RateNeurons, AfferentIsometric ContractionBlood PressureHindlimbAdenosine TriphosphateEnergy MetabolismElectromyographyPhosphatesCreatine KinaseMyocardial ContractionPhosphorus IsotopesPhosphorusUterine ContractionMusclesAdenosine DiphosphateLactatesCreatine Kinase, BB FormLactic AcidCreatine Kinase, MM FormOxygen ConsumptionMuscle FatigueHydrogen-Ion ConcentrationMyocardiumMuscle, SmoothGlycolysisCreatine Kinase, Mitochondrial FormOxidative PhosphorylationMitochondria, MuscleExerciseElectric StimulationGlycogenCalciumGuinea PigsTime FactorsGuanidinoacetate N-MethyltransferaseAdenine NucleotidesAspartic AcidBrainKineticsIsotonic ContractionVasoconstrictionHeartHypoxia, BrainRats, Inbred StrainsRats, WistarRabbitsPerfusionOxygenAdenosine MonophosphateInosine MonophosphateDogsRats, Sprague-DawleyDichloroacetic AcidErgometryPhysical EnduranceMuscle RelaxationMuscle, Smooth, VascularLegIodoacetic AcidModels, BiologicalPhosphorus CompoundsCholineMuscle Fibers, SkeletalRestDose-Response Relationship, DrugPhysical Conditioning, HumanGlucoseAcidosisKneeAcetylcarnitineMyofibrilsAnoxiaBrain ChemistryPotassium ChlorideMagnetic Resonance ImagingIodoacetatesSwineGastrointestinal MotilityTracheaGlycerylphosphorylcholineRegional Blood FlowQuadriceps MuscleMuscle SpindlesPyruvate Dehydrogenase ComplexVasoconstrictor AgentsMyosins