Also known as Mechanical Diagnosis and Therapy (MDT) , the McKenzie Method is a philosophy of active patient involvement and education for back, neck and extremity problems. The key distinction is its initial assessment component—a safe and reliable means to accurately reach a diagnosis and only then make the appropriate treatment plan. Expensive tests are rarely required because Certified MDT clinicians have indicators to know whether—and how—the McKenzie Method will work for each patient. Watch Robin McKenzie discuss his method here: