There is a great variety of interventions for the treatment of patients with chronic low back pain, including the McKenzie method developed by Robin McKenzie in New Zealand in 1981.8 The McKenzie method (also known as Mechanical Diagnosis and Therapy [MDT]) is an active therapy that involves repeated movements or sustained positions and has an educational component with the
purpose of minimizing pain and disability and improving spinal mobility 8. The McKenzie method involves the assessment of symptomatic and mechanical responses to repeated movements and sustained positions. Patients’ responses to this assessment are used to classify them into subgroups or syndromes called derangement, dysfunction, and posture. 8–10 Classification according to one of these groups guides the treatment principles.