Dr. Stuart M. McGill is a professor of spine biomechanics at the University of Waterloo (Waterloo, ON, Canada). His advice is often sought by governments, corporations, legal experts and elite athletes and teams from around the world. Difficult back cases are regularly referred to him for consultation.Topics that will be covered in full interview:• Bracing vs drawing in.• Lower back pain.• Is there generalised lower back pain?• Crossfit and kettlebell swing.• How can we become a back mechanic.