The McKenzie Method Explained: How an MDT Assessment Works

If you have been looking for help with back or neck pain, you may have come across the term "McKenzie Method." As a Cert. MDT (Mechanical Diagnosis and Therapy) certified physical therapist here in East Brunswick, I use this approach every day to help patients understand and manage their pain. Here is what it actually means for you.

What the McKenzie Method Is

The McKenzie Method, formally known as Mechanical Diagnosis and Therapy (MDT), is a classification-based system that physical therapists use to assess and treat back and neck pain,^[1][2] and it has also been applied to some joint problems of the limbs, such as knee osteoarthritis.^[3] It has been tested in many randomized trials for low back pain (a 2018 review found 17), with results that depend on how long the pain has lasted and what MDT is compared with.^[1] Rather than focusing only on where it hurts, MDT looks at how your symptoms change with repeated movements and positions.^[4][5]

That distinction matters for how MDT works. MDT was designed to sort people with low back pain into subgroups based on how their symptoms respond to movement, so that treatment can be matched to each subgroup.^[1][4] In one trial of 230 people with back pain (with or without sciatica) who showed a directional preference, exercises matched to that preferred direction led to greater improvement than exercises in the opposite direction or general exercises,^[4] although the trial followed patients for only two weeks.^[5] When researchers pooled the results of 24 trials in low back pain, though, classification-based approaches such as McKenzie showed only small advantages over general, non-classified care (based on low-certainty evidence), none large enough to be clinically meaningful, and no single classification system on its own did better than general care.^[6]

How a McKenzie Assessment Works

During your first visit, I guide you through a series of carefully chosen movements and positions while tracking how your symptoms respond. We are looking for a phenomenon called centralization, where pain that has spread into a limb moves back toward the spine in response to repeated movements or sustained positions.^[5] Centralization is generally a good sign: in research on low back pain, people whose symptoms centralize or who show a directional preference tend to have a better outlook, although the evidence for neck pain is more limited.^[7] Not everyone shows these responses (in research studies, about two in three people with spinal pain do and about one in three show neither), and research has not shown that they predict who will do better with one treatment than with another.^[7]

Based on that response, we look for a "directional preference": a direction of repeated movement that noticeably eases your pain right away, with the improvement holding afterward.^[4] Your directional preference becomes the foundation of your personalized program. I also watch for movements that push symptoms farther from the spine, such as down into the leg (called peripheralization),^[5] so we know which movements to limit for now.

Why It Focuses on Active Movement

Back and neck pain can also be treated with passive treatments, things done to you, such as heat, ultrasound, or electrical stimulation. For chronic low back pain, a Cochrane review suggests exercise probably reduces pain somewhat more than electrotherapy or other non-exercise physical therapy,^[8] and U.S. physical therapy guidelines recommend exercise.^[9] MDT is an active approach: it uses your own symptom responses to choose your exercises.^[4]

One of the most valuable parts of MDT is that it puts you in control. Once we identify your directional preference, I teach you specific exercises you can perform on your own, so you have a plan if your symptoms flare up. These exercises are not a guarantee against future episodes, though: in a trial of 262 adults who had recently recovered from low back pain, a two-session McKenzie-based self-management program did not meaningfully lower the chance of another activity-limiting episode over the following year compared with a single phone advice session, although it may have reduced the chance of an episode that led them to seek care.^[10]

Conditions MDT Is Used For, and What the Research Shows

• Low back pain, including pain that spreads into the buttock or leg (sciatica-type symptoms). For long-lasting (chronic) low back pain, U.S. physical therapy guidelines say therapists may use MDT, based on moderate evidence,^[9] and a meta-analysis found it reduced disability more than exercise alone but was no better than manual therapy plus exercise.^[1] For recent (acute) low back pain, the guidelines' support is weaker,^[9] and the same meta-analysis found MDT was no better than other rehabilitation approaches.^[1] For sciatica, evidence is limited: in a small trial of 66 people with sciatica from an MRI-confirmed disc herniation, seven sessions of McKenzie-based exercise plus an education book gave results similar to a single session of guideline-based self-management advice after two years, and surgery rates did not differ.^[11]
• Neck pain, including pain that refers into the shoulder or arm. A review of five trials found that MDT's extra benefit over "wait and see" or other approaches may not be clinically important for pain and was not clinically important for disability.^[2] The review authors noted that not all of the treating therapists had the highest level of MDT training, and that it is not yet known whether more training changes the results.^[2]
• Some joint and limb problems. In one trial of 180 people with knee osteoarthritis, exercise chosen through an MDT assessment improved knee pain and function more than no exercise (a wait-list group) at three months.^[3] Because the comparison group did no exercise, the trial does not show that MDT-guided exercise works better than other exercise programs.

What Makes Our Approach Different

At Spineck Physical Therapy, every session is true one-on-one care with me — the same certified therapist every visit, never handed off to an aide. The McKenzie Method relies on careful observation of how your symptoms respond over time, so I re-check your response at each visit and fine-tune your program as you progress.

If you have been dealing with stubborn back or neck pain and want an approach built around how your own symptoms respond to movement, I would be glad to help. Call us at 551-208-3234 to schedule your evaluation and find out whether the McKenzie Method is right for you.

References

1. Lam OT, Strenger DM, Chan-Fee M, et al. Effectiveness of the McKenzie method of Mechanical Diagnosis and Therapy for treating low back pain: literature review with meta-analysis. J Orthop Sports Phys Ther. 2018;48(6):476-490. doi:10.2519/jospt.2018.7562 · PubMed
2. Takasaki H, May S. Mechanical diagnosis and therapy has similar effects on pain and disability as 'wait and see' and other approaches in people with neck pain: a systematic review. J Physiother. 2014;60(2):78-84. doi:10.1016/j.jphys.2014.05.006 · PubMed
3. Rosedale R, Rastogi R, May S, et al. Efficacy of exercise intervention as determined by the McKenzie System of Mechanical Diagnosis and Therapy for knee osteoarthritis: a randomized controlled trial. J Orthop Sports Phys Ther. 2014;44(3):173-181, A1-A6. doi:10.2519/jospt.2014.4791 · PubMed
4. Long A, Donelson R, Fung T. Does it matter which exercise? A randomized control trial of exercise for low back pain. Spine (Phila Pa 1976). 2004;29(23):2593-2602. doi:10.1097/01.brs.0000146464.23007.2a · PubMed
5. Delitto A, George SZ, Van Dillen L, et al. Low back pain. J Orthop Sports Phys Ther. 2012;42(4):A1-A57. doi:10.2519/jospt.2012.42.4.A1 · PubMed
6. Tagliaferri SD, Mitchell UH, Saueressig T, et al. Classification approaches for treating low back pain have small effects that are not clinically meaningful: a systematic review with meta-analysis. J Orthop Sports Phys Ther. 2022;52(2):67-84. doi:10.2519/jospt.2022.10761 · PubMed
7. May S, Runge N, Aina A. Centralization and directional preference: an updated systematic review with synthesis of previous evidence. Musculoskelet Sci Pract. 2018;38:53-62. doi:10.1016/j.msksp.2018.09.006 · PubMed
8. Hayden JA, Ellis J, Ogilvie R, et al. Exercise therapy for chronic low back pain. Cochrane Database Syst Rev. 2021;9(9):CD009790. doi:10.1002/14651858.CD009790.pub2 · PubMed
9. George SZ, Fritz JM, Silfies SP, et al. Interventions for the management of acute and chronic low back pain: revision 2021. J Orthop Sports Phys Ther. 2021;51(11):CPG1-CPG60. doi:10.2519/jospt.2021.0304 · PubMed
10. de Campos TF, Pocovi NC, Maher CG, et al. An individualised self-management exercise and education program did not prevent recurrence of low back pain but may reduce care seeking: a randomised trial. J Physiother. 2020;66(3):166-173. doi:10.1016/j.jphys.2020.06.006 · PubMed
11. Kilpikoski S, Häkkinen AH, Repo JP, et al. The McKenzie Method versus guideline-based advice in the treatment of sciatica: 24-month outcomes of a randomised clinical trial. Clin Rehabil. 2024;38(1):72-84. doi:10.1177/02692155231196393 · PubMed

This article is for general education and is not a substitute for an individual evaluation by a licensed clinician.