Williams Flexion Exercises
SET OR SYSTEM OF RELATED PHYSICAL EXERCISES
McKenzie extension exercises
Williams flexion exercises (WFE) – also called Williams lumbar flexion exercises – are a set or system of related physical exercises intended to enhance lumbar flexion, avoid lumbar extension, and strengthen the abdominal and gluteal musculature in an effort to manage low back pain non-surgically. The system was first devised in 1937 by Dallas orthopedic surgeon Dr.