Quotes from this study:
The McKenzie method for low back pain: a systematic review of the literature with a meta-analysis approach.
Eleven trials of mostly high quality were included. McKenzie reduced pain … on a 0- to 100-point scale, -4.16 points … and disability … -5.22 points at 1-week follow-up when compared with passive therapy for acute LBP.
When McKenzie was compared with advice to stay active, a reduction in disability favored advice … on a 0- to 100-point scale, 3.85 points at 12 weeks of follow-up.Two high-quality studies reporting on acute LBP compared McKenzie with advice to stay active… The pooled results in Figure 5 indicate a significant decrease in disability… … favoring advice to stay active at 12 weeks follow-up.
There is some evidence that the McKenzie method is more effective than passive therapy for acute LBP; however, the magnitude of the difference suggests the absence of clinically worthwhile effects.
My comments:
This is not exactly breaking news, but the McKenzie method of diagnosis and treatment of low back pain is still being taught to physical therapists. And low back pain patients still have to endure end-range and sometimes end-range-plus overpressure, spine extension (backward bending), and, to a lesser degree, flexion stretches. Googling “McKenzie method” will bring up a plethora of physical therapists touting McKenzie method benefits and anecdotal reports of it being great. But what does the actual research say? Ehh, the reality seems a little less remarkable. The results of the above study (which was a meta-analysis that pooled the results of relevant research that went before it) are about what I would expect. Overall, the researchers found the McKenzie method is perhaps slightly better than passive modalities (but not enough to matter), better than Williams’ lumbar flexion exercises, but slightly less effective than the simple advice to keep active. I’ve read McKenzie’s books, so I have a pretty good grasp on his techniques and why I think they don’t work so well for the average low back pain sufferer.
I do agree with McKenzie’s chief observation that spine flexion happens too often and for too long for most people in daily activities, so I do agree that people should take steps to lessen spine flexion. Furthermore, I think this is why this study found McKenzie worked better than Williams flexion exercises but not much better than nothing at all.
Williams flexion exercises were the standard McKenzie was reacting to when he came out with his method favoring spine extension in 1981. This is because once you remove any placebo and gate control effects of flexion stretches on pain, you are left with a motion that causes posterior displacement of lumbar disc material that leads to bulges and herniations. At the same time, ligaments meant to check such motion are made flaccid. Thus, flexion stretches over time decrease spine stability, increasing long-term pain and disability. So I would say McKenzie is not as harmful as Williams’s spine flexion exercise.
In his books, McKenzie likes to use the example of having a person hold their finger backwards at end range until it starts to hurt. Saying this is analogous to what goes on in the discs during spine flexion. I broadly agree. He said that if you remove the stress on the finger and bend it the other way, the pain goes away. To which I say yes and no.
The problem, I think, is that McKenzie goes too far the other way. The solution to pain and injury from too much flexion is not hyperextension, but rather just eliminating the flexion and returning the joint to a more neutral position. This works with both the finger and the back (and neck, for that matter). I would not cure the finger joint pain from prolonged extension by bending it the other way as far as possible and holding it there; rather, I would just remove the stress.
As this paper correctly asserts, the McKenzie method should not be thought of as just extension exercises because McKenzie also teaches spine flexion stretches if the patient has an increase in symptoms with extension during his evaluation. I disagree with this as well, because posterior disc herniation caused by too much flexion during ADLs can be irritated with extension and still worsened eventually with more flexion. Different spinal structures can also play a role in these symptoms’ presentation as well. For example, if one already has a collapsed disk at L5-S1 causing facet joint approximation and arthritis at that level, we would expect to see worsened symptoms with back extension. Flexion stretching in this case might unload the irritated facet joint and provide short-term relief but would be putting the discs above (T12 and L1-L4) at risk for flexion-related injury. A better method in this example (and in most cases of low back pain) would be teaching the patient to avoid both extremes in flexion and extension. This would serve two roles: lessening stress and pain on the posterior facet joints while preventing further degeneration of the remaining vertebral discs.
Worth mentioning is that even with McKenzie’s more common extension-related treatment, he still teaches flexion exercises after pain is resolved “to restore normal range of motion.” I disagree with this as well, since (as McKenzie rightfully surmises) daily activities still generally give people too much spine flexion. As such, I think most don’t need any stretches in spine flexion but rather total body fitness, mobility around the peripheral joints, and awareness to maintain a more neutral and pain-free spine position during work, play, and rest.
Thanks for reading my blog. If you have any questions or comments (even hostile ones), please don’t hesitate to ask/share. If you’re reading one of my older blogs, perhaps unrelated to neck or back pain, and it helps you, please remember SpineFITyoga for you or someone you know in the future.
Chad Reilly is a physical therapist, obtaining his Master’s in Physical Therapy from Northern Arizona University. He graduated summa cum laude with a B.S. in Exercise Science, also from NAU. He is a Certified Strength and Conditioning Specialist and holds a USA Weightlifting Club Coach Certification as well as a NASM personal training certification. Chad completed his yoga teacher training at Sampoorna Yoga in Goa, India.
Update: 12-1-15
I think my best material is written below, answering comments and questions.
This is currently my second most popular blog, and while I think it’s good stuff, I think my best material is written below, answering comments and questions. Moreover, this blog is a bit negative, being mostly about what doesn’t work, or at least what the above meta-analysis suggests doesn’t work very well. However, in answering questions below, I wrote a great deal below about what I think does work. Much of which has been summarized in my low back pain info page.
I made an example low back pain workout video of what I would say is my stereotypical low back pain workout. I don’t start people off on all these exercises but generally start with the standing rows, standing presses, and maybe add the hip in/out machine on day one. All performed 3 sets of 15 reps (easy, medium, and hard weights), stopping immediately if there was any pain. If the person does well with those exercises on day one, I’ll add 1-2 exercises per day until I get to what I think is a complete program. Some patients can’t do all the exercises, some do alternatives, and some do extra, but the video program is my basic.
The exercises themselves only make up about ⅓ of what it often takes to recover from low back pain. The other parts are improving static postures and motor control during active motions, the latter of which the exercises help teach. To help it all, unless a patient has an abdominal hernia or a pacemaker, I almost ALWAYS perform electric muscle stimulation (EMS) to the abdominal and low back region to both decrease pain and improve core strength. This works especially well when patients can’t perform regular exercises intense enough to increase strength, and the lucky side effect is the harder you do EMS, generally the less pain you have after.
Update 2018: And now we have SpineFITyoga
Where I teach the same principles using bodyweight, with 5-minute daily programs.

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