The McKenzie approach is a popular treatment among physiotherapists for the treatment of actue and chronic low back pain. It is based on a series of exercises designed to gradually increase back extension tolerance, muscular strength, endurance and postural mechanics. It is used frequently in the treatment of non-specific low back pain, particularly in the treatment of desk-jockeys who spend their day in spinal flexion.
Machado et al 2006 completed a systematic review of 11 trials. McKenzie treatments reduced pain and disability more effectively than passive treatment 1 week post-intervention and 12 weeks post-intervention. When compared to advice to stay active, and use a sensible exercise plan- McKenzie did better at 1 week post-intervention but exercise did better 12 weeks later.
Take home, when rehabbing from a back injury, mixing McKenzie with some general exercise might be the way to go.