Low Back PainTorsoBack PainPain MeasurementChronic PainLumbar VertebraePainDisability EvaluationBackLumbosacral RegionPhysical Therapy ModalitiesChronic DiseaseAcute PainManipulation, SpinalPain ManagementSciaticaIntervertebral Disc DisplacementIntervertebral DiscExercise TherapyBack InjuriesOccupational DiseasesSacroiliac JointNeck PainQuestionnairesZygapophyseal JointSpinal DiseasesLiftingIntervertebral Disc DegenerationPain ThresholdTreatment OutcomePostureChiropractic