Chronic back pain affects millions of adults, yet traditional medical approaches often fall short of delivering meaningful functional improvements. The challenge lies not just in pain reduction, but in helping people regain the confidence and capacity to move freely without fear of re-injury. The PACBACK trial examined whether combining psychological support with physical interventions could break this cycle more effectively than standard care alone. Over 12 months, researchers tracked 750 adults with acute low back pain using the Roland-Morris Disability Questionnaire, a validated measure of functional limitation. Both biopsychosocial self-management alone and the combination with spinal manipulation produced statistically significant reductions in disability scores—1.2 and 1.1 points respectively—compared to guideline-based medical care. Notably, neither approach reduced actual pain intensity more than standard treatment. This disconnect between disability improvement and unchanged pain levels suggests these interventions may work primarily through psychological mechanisms rather than direct pain relief. The magnitude of benefit sits just below the 2-3 point threshold typically considered clinically meaningful, though this varies by individual circumstances. The findings align with growing evidence that back pain chronicity stems largely from fear-avoidance behaviors and catastrophic thinking patterns. While the average improvements appear modest, some participants likely experienced substantial functional gains. For practitioners, this reinforces the value of addressing the psychological dimensions of back pain alongside physical symptoms, even when pain levels remain unchanged.