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Trunk Range of Motion

Original Editor - Lucinda hampton

Top Contributors - Lucinda hampton, Stacy Schiurring, Jess Bell, Kim Jackson, Aminat Abolade, Ewa Jaraczewska and Ahmed M Diab  

Introduction

The trunk has three distinct spinal regions: the thoracic spine (T1-T12), which forms the posterior chest wall and articulates with the ribs to provide stability while allowing rotational movement; the lumbar spine (L1-L5), characterised by larger vertebrae that bear substantial load and permit considerable flexion and extension; and the sacrum, a triangular fusion of five vertebrae that connects the spine to the pelvis via the sacroiliac joints.

Assessing trunk range of motion (ROM) is a fundamental part of the musculoskeletal assessment. Trunk mobility underpins nearly all functional activities, from basic tasks, such as dressing and reaching, to complex movements required for work and sport. Limited trunk ROM may indicate underlying pathology, compensatory movement patterns, or risk factors for injury, while excessive mobility might suggest instability or hypermobility disorders. Trunk movement dysfunction can also contribute to pain presentations in adjacent regions, including the neck, shoulders, hips, and knees. By systematically measuring trunk ROM, therapists can establish baseline values for treatment planning, identify movement restrictions that require intervention, and objectively monitor progress throughout rehabilitation.

Click the following links if you would like to learn more about the anatomy of the thoracic spine, lumbar spine, and sacrum.

Spinal Movement Patterns

The concept of capsular patterns for the spine presents significant theoretical and practical limitations. Unlike peripheral joints, where a single capsular structure governs restriction patterns, the spine comprises multiple segmental facet joints. Each joint has its own capsule, which makes the aggregate "capsular pattern" both less precise and less clinically meaningful.[1] The traditional description, lateral flexion and rotation equally limited with extension more restricted, lacks robust research evidence and is based primarily on clinical observation rather than systematic investigation.[2] Furthermore, spinal pathology rarely affects all segments uniformly. The multi-segmental nature of trunk movement makes it difficult to determine whether observed restrictions reflect true capsular involvement or other pathological processes, such as muscular guarding, disc derangement, or neural tension. Consequently, many clinicians question the clinical utility of applying the capsular pattern concept to spinal assessment.

Non-capsular patterns of spinal restriction often provide more diagnostically useful information than traditional capsular patterns. These patterns are clinical reasoning frameworks based on clinical observations rather than evidence-based findings. Unilateral limitations in lateral flexion or rotation may suggest ipsilateral facet joint dysfunction, muscle spasm, or contralateral neural tension, while isolated extension loss with preserved flexion might indicate facet joint pathology or posterior element dysfunction. Conversely, disproportionate flexion limitation compared to extension could suggest disc pathology, particularly when accompanied by peripheralisation of symptoms. Asymmetrical restrictions that differ between active and passive movement, or that change with repeated movements, may indicate mechanical derangement syndromes or movement control impairments rather than structural joint restriction. These non-capsular patterns, when clustered with pain behaviour, symptom location, and response to loading strategies, guide clinical reasoning more effectively than attempting to identify a generalised capsular pattern across the entire spinal region.[3][4][5]

Movement-based classification systems have emerged as clinically valuable alternatives to traditional joint-based assessment approaches. The McKenzie Method (Mechanical Diagnosis and Therapy) categorises patients based on their directional preference (i.e., the movement direction that centralises or abolishes symptoms). It identifies derangement, dysfunction, and postural syndromes through repeated movement testing.[6] Treatment-Based Classification stratifies patients into subgroups (manipulation, stabilisation, specific exercise, and traction) based on clusters of examination findings and response to intervention.[7][8] The Movement System Impairment approach identifies habitual movement patterns and postural alignments that contribute to tissue stress and symptom production. It classifies patients by their primary movement direction of impairment (e.g., lumbar flexion syndrome, rotation with extension syndrome).[9][10] These classification systems emphasise functional movement patterns, symptom behaviour, and treatment response rather than attempting to identify anatomical restrictions through traditional orthopaedic concepts like capsular patterns. They provide rehabilitation professionals with more actionable frameworks for clinical decision-making and intervention selection.

Normative values for trunk ROM vary by study. The following values represent the generally accepted active ROM values for the trunk.

Thoracic spine:[11][12][13]

  • 20-26° of flexion
  • 22-25° of extension
  • 32-48° of combined flexion-extension
  • 20-30° per side for lateral flexion (side-bending)
  • 35-47° per side for rotation

Lumbar spine:[13][14][15]

  • 70° of flexion
  • 40° of extension
  • 36° per side for lateral flexion (side-bending)
  • 38-42° per side for rotation

Sacrum:[13][16][17]

  • 3° of flexion-extension
  • 1.5° of axial rotation
  • 0.8° of lateral flexion
  • Motion is typically limited to 2-4 mm of translation and 2-5° of rotation due to the bony architecture and the surrounding ligaments of the joint

Trunk range of motion values vary considerably between individuals due to multiple interacting factors. Age is the primary determinant, with movement in all directions decreasing across the lifespan.[15] Gender influences trunk ROM, with females generally demonstrating greater mobility than males in lateral flexion and rotation,[18] while body composition, including increased trunk adiposity with ageing, can limit movement. Measurement technique and patient position significantly impact recorded values, as thoracic extension measured in unloaded positions (prone, four-point kneeling) is significantly greater than in loaded positions (standing, sitting), and lumbar-pelvic postures differ substantially between standing and sitting.[19] [20] Additional factors affecting trunk ROM include measurement instrument selection, examiner reliability, soft tissue depth, habitual posture, presence of pain or pathology, and patient effort and willingness to move.[21]

Trunk ROM Testing Precautions

Before assessing trunk ROM, clinicians must conduct a thorough screening for red flags that indicate serious spinal pathology requiring medical referral rather than movement testing.

Red flags warranting particular caution include: older age (age >70 years), prolonged use of corticosteroid drugs, severe trauma, and presence of multiple red flags which substantially increases the probability of spinal fracture; history of cancer, which significantly increases post-test probability for spinal malignancy; sudden onset of severe pain without a clear mechanism of injury; progressive neurological deficits; and signs suggesting cauda equina syndrome.[22] [23]

Pain, fear of injury, disuse, or neuromuscular inhibition may limit mobility by decreasing the individual's effort, and if ROM measurements fail to match known pathology, measurements should be repeated.[13] During testing, therapists should observe a patient's willingness to move and note any compensatory movement patterns, protective guarding, or disproportionate pain responses. Any painful movements should be completed last, minimising the risk of exacerbating pain.[24]

Testing should proceed cautiously in patients with known spinal instability, acute inflammatory conditions, recent spinal surgery, and osteoporosis (where there's a risk for compression fracture).

Assessing Trunk Range of Motion

A trunk ROM assessment typically measures combined trunk movement rather than individual spinal segments. Measurement tools include measuring tape, inclinometers, goniometers, and 3D motion analysis systems.[24][25][26]

Radiographic analysis is the most accurate method of measuring vertebral movement, but routine use of radiography is not recommended due to the risk of radiation exposure and cost. Several clinical measurement methods can be applied to assess trunk ROM, including the fingertip-to-floor test, the Schober test, inclinometers, standard goniometers, and tape measures.[27][28] Various smartphone and app technologies can also be utilised in the clinic.[29] Visual observation is useful to assess the quality of movement, aberrant patterns, pain location, difficulty with motion, and willingness to move.

Trunk ROM Measurement Methods

Flexion and Extension

Tape Measure Method[30]

  • Landmarks: C7 to S2 (for the entire trunk, i.e., thoracic and lumbar spine) OR T12/L1 to S2 (for lumbar spine only)
  • Position: Standing, feet shoulder-width apart (or seated if balance is poor)
  • Technique: Two measurements are taken—one at neutral, one at end range. The difference between measurements equals the ROM
  • Normative values: Flexion approximately 7.2 cm; Extension approximately 4.21 cm
  • Alternative method: Fingertip-to-floor measurement—no normative values are available, but this method is useful for tracking individual patient progress
Lateral Flexion

Option 1: Goniometer[30]

  • Fulcrum: Spinous process of S2 (just distal to the posterior superior iliac spine)
  • Proximal arm: Perpendicular to the ground
  • Distal arm: Along the spinous processes of the lumbar spine
  • Note: This method is recommended if the patient has a scoliosis or lateral shift due to low back pain

Option 2: Tape Measure[30]

  • Technique: Fingertips-to-floor measurement
  • Consideration: If the patient moves into forward flexion, they should be positioned against a wall to isolate pure lateral bending
Rotation

Goniometer[30]

  • Fulcrum: Top of the head
  • Proximal arm: Between the tubercles on the iliac crest (across the top of the iliac crest)
  • Distal arm: Between the acromion processes
  • Key difference from cervical rotation: Measuring shoulder movement, not nose movement

Additional Resources

The following videos review the importance of the active ROM assessment for the thoracic and lumbar spine. These videos show the observation method of assessing movement.

[31]

[32]

This video shows how trunk flexion is measured using an inclinometer.

[33]

References

  1. ↑ Bijl, J Dekker, ME van Baar, RAB Oostendorp, AM Lemmens, JWJ Bijlsma, Th. B. Voorn D. Validity of Cyriax's concept capsular pattern for the diagnosis of osteoarthritis of hip and/or knee. Scandinavian Journal of Rheumatology. 1998 Jan 1;27(5):347-51.
  2. ↑ Lim W. Clinical Application and Limitations of the Capsular Pattern. Physical Therapy Korea. 2021 Feb 20;28(1):13-7.
  3. ↑ Petty NJ, Ryder D, eds. Musculoskeletal Examination and Assessment: A Handbook for Therapists. 5th ed. Edinburgh: Elsevier; 2017.
  4. ↑ Lam OT, Strenger DM, Chan-Fee M, Pham PT, Preuss RA, Robbins SM. Effectiveness of the McKenzie method of mechanical diagnosis and therapy for treating low back pain: literature review with meta-analysis. Journal of orthopaedic & sports physical therapy. 2018 Jun;48(6):476-90.
  5. ↑ Stankovic R, Johnell O, Maly P, Wilmer S. Use of lumbar extension, slump test, physical and neurological examination inthe evaluation of patients with suspected herniated nucleurs pulposus. A prospective clinical study. Manual therapy. 1999 Feb 1;4(1):25-32.
  6. ↑ Lam OT, Strenger DM, Chan-Fee M, Pham PT, Preuss RA, Robbins SM. Effectiveness of the McKenzie method of mechanical diagnosis and therapy for treating low back pain: literature review with meta-analysis. Journal of orthopaedic & sports physical therapy. 2018 Jun;48(6):476-90.
  7. ↑ Delitto A, Erhard RE, Bowling RW. A treatment-based classification approach to low back syndrome: identifying and staging patients for conservative treatment. Physical therapy. 1995 Jun 1;75(6):470-85.
  8. ↑ Alrwaily M, Timko M, Schneider M, Stevans J, Bise C, Hariharan K, Delitto A. Treatment-based classification system for low back pain: revision and update. Physical therapy. 2016 Jul 1;96(7):1057-66.
  9. ↑ Sahrmann S. Diagnosis and treatment of movement impairment syndromes: Pageburst retail. Elsevier Mosby; 2001.
  10. ↑ Sahrmann S, Azevedo DC, Van Dillen L. Diagnosis and treatment of movement system impairment syndromes. Brazilian journal of physical therapy. 2017 Nov 1;21(6):391-9.
  11. ↑ Morita D, Yukawa Y, Nakashima H, Ito K, Yoshida G, Machino M, Kanbara S, Iwase T, Kato F. Range of motion of thoracic spine in sagittal plane. European Spine Journal. 2014 Mar;23(3):673-8.
  12. ↑ Johnson KD, Kim KM, Yu BK, Saliba SA, Grindstaff TL. Reliability of thoracic spine rotation range-of-motion measurements in healthy adults. Journal of athletic training. 2012 Jan 1;47(1):52-60.
  13. ↑ 13.0 13.1 13.2 13.3 Savlovskis J. Range of the Motion (ROM) of the Cervical, Thoracic and Lumbar Spine in the Traditional Anatomical Planes. Anatomy Standard. 2020.
  14. ↑ Nattrass CL, Nitschke JE, Disler PB, Chou MJ, Ooi KT. Lumbar spine range of motion as a measure of physical and functional impairment: an investigation of validity. Clinical Rehabilitation. 1999 Jun;13(3):211-8.
  15. ↑ 15.0 15.1 Apti A, Çolak TU, Akçay B. Normative values for cervical and lumbar range of motion in healthy young adults. Journal of Turkish Spinal Surgery. 2023;34(3). [1]
  16. ↑ Goode A, Hegedus EJ, Sizer P, Brismee JM, Linberg A, Cook CE. Three-dimensional movements of the sacroiliac joint: a systematic review of the literature and assessment of clinical utility. Journal of Manual & Manipulative Therapy. 2008 Jan 1;16(1):25-38.
  17. ↑ Cohen SP. Sacroiliac joint pain: a comprehensive review of anatomy, diagnosis, and treatment. Anesthesia & Analgesia. 2005 Nov 1;101(5):1440-53.
  18. ↑ Patel P, Parmar L. Comparison between genders for trunk mobility in normal adults: A cross sectional study. International Journal of Health Sciences. 2022(IV):1564-73.
  19. ↑ Edmondston S, Waller R, Vallin P, Holthe A, Noebauer A, King E. Thoracic spine extension mobility in young adults: influence of subject position and spinal curvature. journal of orthopaedic & sports physical therapy. 2011 Apr;41(4):266-73.
  20. ↑ De Carvalho DE, Soave D, Ross K, Callaghan JP. Lumbar spine and pelvic posture between standing and sitting: a radiologic investigation including reliability and repeatability of the lumbar lordosis measure. Journal of manipulative and physiological therapeutics. 2010 Jan 1;33(1):48-55.
  21. ↑ Littlewood C, May S. Measurement of range of movement in the lumbar spine—what methods are valid? A systematic review. Physiotherapy. 2007 Sep 1;93(3):201-11.
  22. ↑ Downie A, Williams CM, Henschke N, Hancock MJ, Ostelo RW, De Vet HC, Macaskill P, Irwig L, Van Tulder MW, Koes BW, Maher CG. Red flags to screen for malignancy and fracture in patients with low back pain: systematic review. Bmj. 2013 Dec 11;347.
  23. ↑ Williams CM, Henschke N, Maher CG, van Tulder MW, Koes BW, Macaskill P, Irwig L. Red flags to screen for vertebral fracture in patients presenting with low‐back pain. Cochrane Database of Systematic Reviews. 2023(11).
  24. ↑ 24.0 24.1 Ichikawa K, Otsuka T, Abduh HA, Kuruma H. Assessing validity of thoracic spine rotation range of motion measurement methods: comparison of magnetic resonance imaging and clinical measurements. Journal of Physical Therapy Science. 2024;36(3):95-101.
  25. ↑ Littlewood C, May S. Measurement of range of movement in the lumbar spine—what methods are valid? A systematic review. Physiotherapy. 2007 Sep 1;93(3):201-11.
  26. ↑ Valle MB, Schmit EF, Sedrez JA, Candotti CT. Assessment of thoracic and lumbar spine range of motion: Systematic review with meta-analysis. Journal of Physical Education. 2019 Apr 1;29:e2946.
  27. ↑ Nitschke JE, Nattrass CL, Disler PB, Chou MJ, Ooi KT. Reliability of the American Medical Association Guides' model for measuring spinal range of motion: its implication for whole-person impairment rating. Spine. 1999 Feb 1;24(3):262-8.
  28. ↑ MAYER TG, TENCER AF, Kristoferson SA, Mooney VE. Use of noninvasive techniques for quantification of spinal range-of-motion in normal subjects and chronic low-back dysfunction patients. Spine. 1984 Sep 1;9(6):588-95.
  29. ↑ Aburub AS, Alawna M, Mohamed AA, Nassif M. Using a smartphone goniometer to measure active thoracolumbar spine range of motion of lateral flexion and rotation among people with non-specific low back pain: a reliability and validity study. International Journal of Therapy And Rehabilitation. 2025 May 2;32(5):1-3.
  30. ↑ 30.0 30.1 30.2 30.3 Cunningham , S. Introduction to Musculoskeletal Concepts in Rehabilitation. Trunk and Lower Limb Range of Motion. Physioplus. 2025.
  31. ↑ YouTube. Thoracic Spine Active Range of Motion / Movement | Clinical Physio. Available from: https://www.youtube.com/watch?v=ghL3AJfRT6k [last accessed 20/October/2025]
  32. ↑ YouTube. Lumbar Spine Active Range of Motion / Movement | Clinical Physio. Available from: https://www.youtube.com/watch?v=c8Wj5jJPySo [last accessed 20/October/2025]
  33. ↑ YouTube. ROM Lumbar spine flexion with tape measure | Ryan J. Available from: https://www.youtube.com/watch?v=eHoE5Ki4u5Q [last accessed 20/October/2025]
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