The Neck Lateral Flexion Test measures how far the client can side-bend the head and neck. It is useful for tracking cervical ROM, comparing sides and recording symptoms during side-bending.
A client may feel restricted tilting the head to one side, notice asymmetry during sport or report stiffness after desk work. The Neck Lateral Flexion Test provides a repeatable way to record left and right cervical side-bending ROM.
Test name: Neck Lateral Flexion Test
Purpose: Assess cervical side-bending ROM
What it assesses: Ability to tilt the head/neck sideways
Equipment: Measurz inclinometer
Key finding: Lateral flexion angle in degrees per side
Best used with: Neck flexion, extension, rotation and shoulder/upper-quarter testing
Key limitation: Shoulder elevation and trunk movement can affect results
The Neck Lateral Flexion Test measures the amount of cervical side-bending to each side.
It is used to compare side-to-side neck mobility, establish baseline ROM and track progress.
It measures cervical lateral flexion ROM. It does not diagnose neck symptoms, muscle tightness or headache source.
This is usually active ROM. The client side-bends the neck themselves. Record any assistance.
Desk workers, athletes, drivers, gym clients and anyone where neck side-bending comparison is relevant.
Measurz inclinometer, chair or standing space, Measurz app and notes for side, pain, symptoms and shoulder compensation.
Ask the client to sit or stand upright. Place the inclinometer on the head according to the chosen protocol. Ask the client to tilt the head to one side without lifting the shoulder or rotating the head. Save the angle, then repeat to the other side.
Record degrees left and right. Compare sides and symptoms rather than relying only on a single value.
Evidence level: Level 2, related or closest available reference values.
Cervical lateral flexion values vary by age, sex, symptoms and device. Use matched references only when available and prioritise side comparison.
A 2022 systematic review reported good-to-excellent reliability for several smartphone neck ROM applications, including clinometer-style measures, but evidence varies by app and population.
Common errors include shoulder shrugging, trunk lean, head rotation, inconsistent device placement and pushing into symptoms.
Use this test to monitor neck side-bending ROM, compare sides and add context to upper-quarter mobility and sport movement.
Record side, lateral flexion angle, pain score, symptom location, shoulder elevation, trunk lean, device placement and retest comparison.
Neck Flexion Test
Neck Extension Test
Neck Rotation Test
Shoulder Abduction Test
Spine Lateral Flexion Test
Thoracic Mobility Assessment
It measures side-bending ROM of the neck.
Yes. Side comparison is important.
Shoulder elevation, trunk lean and head rotation.
No. It is a movement finding.
The Neck Lateral Flexion Test measures cervical side-bending.
Test both sides.
Control shoulder and trunk compensation.
Record symptoms.
Track changes in Measurz.
Keogh, J. W. L., et al. (2022). Measurement properties of smartphone applications for the measurement of neck range of motion: A systematic review and meta-analysis. BMC Musculoskeletal Disorders, 23, 138.
Ghorbani, F., Kamyab, M., Azadinia, F., & Ahmadi, A. (2020). The reliability and concurrent validity of digital inclinometer, smartphone applications, and the cervical range of motion device for measuring cervical range of motion. Iranian Rehabilitation Journal, 18(4), 415–424.
Fraeulin, L., et al. (2020). Intra- and inter-rater reliability of joint range of motion tests using tape measure, digital inclinometer and inertial motion capturing. PLOS ONE, 15(12), e0243646.
