Psoas MusclesPsoas AbscessThighMusclesMuscle Fibers, SkeletalMuscle ContractionRabbitsSarcomeresMuscle, SkeletalIsometric ContractionMyosinsMyofibrilsMuscle ProteinsMuscle RelaxationMagnesium CompoundsMuscle, SmoothTroponin CPhotolysisAdenosine TriphosphateParaspinal MusclesMuscle, Smooth, VascularMuscle DevelopmentPhosphatesAdenosine DiphosphateBiophysical PhenomenaCalciumActomyosinMuscle Fibers, Fast-TwitchX-Ray DiffractionMuscle Fibers, Slow-TwitchTroponinRetroperitoneal SpaceBiophysicsBiomechanical PhenomenaKineticsActinsGlycerolMuscle FatigueMyosin SubfragmentsMuscle DenervationActin CytoskeletonRhodaminesModels, BiologicalElasticityMyocytes, Smooth MuscleMitochondria, MuscleAdenosine TriphosphatasesOsmolar ConcentrationNeck MusclesOculomotor MusclesStress, MechanicalQuadriceps MuscleMuscle, StriatedMuscle WeaknessTemperatureTime FactorsMuscle SpindlesRespiratory MusclesPapillary Muscles