Dr. Stuart McGill is one of the biggest influences on the spine-first philosophy laid out in Becoming a Supple Leopard. He is a retired Professor Emeritus at the University of Waterloo, the writer of many influential books, and is an expert on back pain. Stu speaks with us about pain, the mechanisms, and his unique treatment methodology with clinical examples including his work with legendary powerlifter, Brian Carroll, the subject of his newest book, Gift of Injury (written with Carroll).