RSM-TPT-011
Written by Hironori Ikeda, MSc Sports Medicine
RSM International Academy · Chiang Mai, Thailand
What Should You Assess When Lateral Flexion Reproduces One-Sided Lower Back Pain?
Lower back pain on one side may involve QL or paraspinal loading, thoracolumbar-junction findings or sensory referral near the iliac crest. A tender QL does not establish the source. Compare the exact painful side bend or turn with regional palpation and keep the original movement as the treatment baseline.
This article focuses on choosing a local posterior contact when one-sided back pain fits a musculoskeletal presentation. I compare the painful turn or side bend with the QL and paraspinal findings before working between the iliac crest and lower ribs. A softer QL region without a change in the original task sends me back to the differential, including the TLJ and sensory referral near the crest.
You will learn how I compare the QL, multifidus and thoracolumbar junction (TLJ), use anatomical layers to guide palpation, and re-test the same painful movement before changing the treatment plan.
In This Article
- What Should You Assess When Lateral Flexion Reproduces One-Sided Lower Back Pain?
- In This Article
- 1. One-Sided Lower Back Pain Assessment: Lumbar Lateral Flexion, Rotation & Breathing
- 2. QL Palpation: 12th Rib, Iliac Crest and Breathing
- One-sided low-back pain: what changes the original movement?
- 3. One-Sided Low Back Pain in Golf, Tennis & Walking: QL Kinetic Chain Assessment
- 4. Low Back Pain With Rotation or Extension: TLJ, Facet & Superior Cluneal Nerve Assessment
- 5. One-Sided Low Back Pain Manual Therapy: QL Position, Pain Relief & Re-Test
- Related RSM Clinical Blogs
- Study Trigger Point Therapy at RSM
1. One-Sided Lower Back Pain Assessment: Lumbar Lateral Flexion, Rotation & Breathing
Before movement testing, check whether routine manual assessment is appropriate. Back pain with new bladder or bowel changes, loss of feeling around the genitals or anus, or pain, tingling, weakness or numbness in both legs needs emergency medical assessment. Severe pain that starts suddenly or worsens quickly, or back pain with fever, shivering or feeling generally unwell, needs urgent medical assessment. Do not use a comfortable palpation response to dismiss these findings. See the NHS back-pain guidance.
For one-sided lower back pain, I begin in standing with lumbar lateral flexion. I compare both sides: where movement stops, how the space between the 12th rib and iliac crest changes, and exactly where the client feels the familiar pain.
I then add one condition at a time. The client reaches the arm on the painful side across towards the opposite side, lengthening latissimus dorsi. I compare lateral flexion alone, lateral flexion plus rotation, and the same movement coordinated with breathing. Does the familiar pain change when latissimus dorsi is lengthened? Does it behave more like a lower-rib, intercostal, QL, TLJ or lumbar-region symptom?
This does not diagnose a tissue from one movement. It gives the therapist a practical starting map. The movement that reproduces pain, combined with the exact pain location, helps narrow the next palpation and assessment question.
2. QL Palpation: 12th Rib, Iliac Crest and Breathing
One-sided low-back pain: what changes the original movement?
Finding to compare | Next assessment decision |
Local QL or paraspinal findings match the painful side bend | Use rib and iliac-crest landmarks to guide a supported, tolerable muscle-region comparison. |
Local tenderness eases but the original turn stays painful | Revisit thoracolumbar, rib and crest-region findings instead of treating a softer muscle as functional recovery. |
Extension or rotation changes pain near the posterior iliac crest | Consider the TLJ and superior-cluneal differential without diagnosing a joint or nerve source from one response. |
This is an RSM assessment summary of the comparisons explained below, not a set of stand-alone diagnostic tests.
QL connects the iliac crest, lumbar transverse processes and 12th rib. It contributes to lateral trunk support and control of the rib-to-pelvis relationship; with the thorax fixed, it can assist pelvic elevation. I compare the rib attachment, iliac attachment and deeper paraspinal region rather than labeling every tender point QL.
In supported side-lying, a small trunk side-bend changes the distance between the lower rib and iliac crest. I compare comfortable breathing in the same position and record whether the familiar pain changes. Rib motion and pain response do not reveal whether a fascial layer, muscle or joint is the sole source.
Latissimus and erector spinae are more superficial than the intended deep comparison. I choose broad tolerable contact according to the landmark and tissue layer, avoiding force beneath the 12th rib. If I cannot identify the layer, I change support and direction rather than increase pressure.
3. One-Sided Low Back Pain in Golf, Tennis & Walking: QL Kinetic Chain Assessment
For a golfer or tennis player, I compare a slow unloaded trunk turn in the painful direction while keeping foot position consistent. I record whether pain appears during rotation itself or when the trunk also side-bends. Handedness alone does not establish which QL is short or painful.
If the complaint occurs when stepping, I observe pelvic elevation as the foot clears a low step. Hip flexion, knee flexion and ankle dorsiflexion also create clearance; catching the foot does not identify QL dysfunction. I change step height or hand support separately to see which demand alters the familiar symptom.
The regional comparison follows the finding. A limitation at the hip may justify a separate hip-motion test, while new weakness or altered sensation calls for neurological assessment. I do not add a list of lower-limb treatments merely because the task involves walking.
4. Low Back Pain With Rotation or Extension: TLJ, Facet & Superior Cluneal Nerve Assessment
If the QL region becomes easier to move but the original pain does not change, I widen the assessment. I compare the thoracolumbar junction (TLJ), especially around T12–L1, lower posterior ribs, lumbar movement and the area just above or behind the posterior iliac crest where superior cluneal nerves cross.
I compare rotation, extension, flexion and lateral flexion, then map the symptom for each movement. Extension and rotation can change the loading environment around lumbar or thoracolumbar facet joints, but a painful test does not diagnose a facet joint. Symptoms around the lower posterior ribs may also justify a breathing and serratus posterior inferior comparison.
Maigne syndrome is useful as a differential framework, not a label for every one-sided low-back pain. The literature distinguishes a TLJ-related presentation from a peripheral presentation involving superior cluneal nerve branches. The clinical lesson is to separate the location of pain from a possible source, then refer when neurological, systemic or non-mechanical findings require it.
5. One-Sided Low Back Pain Manual Therapy: QL Position, Pain Relief & Re-Test
In side-lying, I support the legs and choose a comfortable trunk position before applying broad, tolerable contact to the identified QL-adjacent region. A rib-directed contact and a more superficial latissimus or paraspinal contact have different anatomical targets; neither requires forceful stretching or breath-holding.
If the response suggests a relevant hip or pelvic contribution, I compare that one region separately. Manual therapy remains part of an appropriate movement and loading plan. Joint techniques require specific training, consent and indication rather than being routine additions.
Repeat the same standing side-bend with the same foot position and arm reach, then the same rotation only if it was a useful baseline. Compare where pain begins and whether the lower rib approaches the iliac crest differently. If the complaint was step clearance, repeat the same step height and support; improvement in tissue feel is not a substitute.
Related RSM Clinical Blogs
Browse all Trigger Point Therapy clinical guides
▷ Low Back Pain: Muscle, Joint or Nerve? — Remedial Massage · Develop a regional lower-back differential.
▷ Pain Between Rib and Pelvis: QL, 12th Rib & TLJ — Trigger Point Therapy · Compare side-bending and breathing with rib-to-pelvis pain.
▷ Hip-Spine Dissociation: Separating Hip From Lumbar Motion — Orthopedic Massage — Spine Mobility & Breathing · Distinguish hip movement from added lumbar motion.
▷ TLJ Pain / Maigne Pattern: T10-L2, Facets & 12th Rib — Orthopedic Massage — Spine Mobility & Breathing · Explore thoracolumbar and cluneal-nerve differentials.
Study Trigger Point Therapy at RSM
Develop the palpation foundation for connecting posterior trunk landmarks with side bending, arm position and a testable local contact choice; recurring learner feedback also emphasizes detailed functional anatomy, hands-on palpation correction and movement re-testing rather than treating every one-sided low-back symptom as a simple muscle problem.
For further study, Remedial Massage develops differential assessment and treatment planning beyond the local palpation finding. Check the course's entry requirements when planning your progression.
▷ Trigger Point Therapy — course details and application
About the Author
Hironori Ikeda, MSc Sports Medicine
Founder and lead instructor of RSM International Academy, Chiang Mai, Thailand. His teaching connects functional anatomy, clinical palpation, movement assessment and sports medicine manual therapy.