McKenzie method

The McKenzie method is a technique primarily used in physical therapy. It was developed in the late 1950s by New Zealand physiotherapist Robin McKenzie. In 1981 he launched the concept which he called "Mechanical Diagnosis and Therapy (MDT)" – a system encompassing assessment, diagnosis and treatment for the spine and extremities. MDT categorises patients' complaints not on an anatomical basis, but subgroups them by the clinical presentation of patients.

McKenzie exercises involve spinal extension exercises, as opposed to Williams flexion exercises, which involve lumbar flexion exercises. Provided by Wikipedia