The Wrist Radial Deviation Test measures how far the wrist can move toward the thumb side. It is useful for tracking wrist mobility, comparing sides and adding context to gripping, racquet sports, golf, manual work and upper-limb loading.
A client may report restriction when moving the wrist toward the thumb side, discomfort with gripping tools, or asymmetry during racquet, stick or gym-based movements. The Wrist Radial Deviation Test provides a repeatable way to measure this smaller but important wrist motion.
Because radial deviation usually has less available range than flexion, extension or ulnar deviation, small setup errors can make a noticeable difference. Consistent forearm position, device alignment and recording method are essential when tracking change over time.
Test name: Wrist Radial Deviation Test
Purpose: Assess wrist radial deviation range of motion
What it assesses: Ability to move the wrist toward the thumb/radial side
Equipment: Measurz inclinometer or equivalent inclinometer
Key finding: Radial deviation angle in degrees
Best used with: Wrist ulnar deviation, wrist flexion, wrist extension, forearm pronation/supination and grip strength
Key limitation: It is a small-range test, so device placement and forearm movement can strongly affect the score
The Wrist Radial Deviation Test is a range of motion assessment that measures side-bending of the wrist toward the thumb side of the hand.
In a Measurz workflow, the movement is recorded in degrees using an inclinometer aligned with the third metacarpal. The goal is to isolate wrist movement as much as practical while keeping the forearm still.
This test is used to establish baseline wrist mobility, compare left and right sides, monitor progress across sessions and add context to tasks requiring precise wrist control.
Radial deviation may be relevant for gripping, racquet sports, golf, hockey, climbing, manual work, lifting and activities where the wrist repeatedly moves side to side.
The test measures wrist radial deviation ROM in degrees.
It does not measure grip strength, thumb mobility, wrist stability, pain source, forearm rotation, tendon capacity or overall hand function. A reduced score may be useful information, but it does not explain the cause of restriction on its own.
Active radial deviation is measured when the client moves the wrist toward the thumb side themselves.
Passive radial deviation may be measured when the movement professional assists the wrist into the position. Active and passive ROM should be recorded separately because they provide different information. Avoid comparing an active score from one session with a passive score from another session as if they are the same measurement.
This test may be useful for racquet sport athletes, golfers, climbers, gym clients, manual workers, musicians, combat sport athletes and anyone where wrist side-bending mobility or side-to-side comparison is relevant.
It may also be useful when wrist ROM is being tracked alongside grip strength, forearm rotation or upper-limb loading tasks.
Measurz inclinometer or equivalent inclinometer
Chair or treatment table
Optional forearm support
Measurz app
Notes field for side, pain score, symptom location, active/passive method and compensation
Ask the client to sit comfortably with the elbow tucked close to the trunk and flexed to approximately 90 degrees. Position the forearm in pronation, with the palm facing down.
The forearm may be supported on a table if needed. If support is used, record it and use the same setup when retesting.
Align the inclinometer with the third metacarpal. Ask the client to move the wrist toward the thumb side as far as possible without lifting, rotating or sliding the forearm.
Pause and save the result at the end of the available controlled range.
Repeat on the opposite side if side comparison is required.
Record any pain, stiffness, clicking, apprehension, forearm movement, finger movement or compensation.
Record radial deviation in degrees. A practical reference range for wrist radial deviation is commonly around 15–20 degrees, but this should be interpreted with the client’s age, activity demands, symptoms, previous injury history and test setup.
A lower radial deviation score may indicate reduced thumb-side wrist side-bending under the tested conditions. It does not identify the cause. Stronger interpretation comes from comparing the result with:
The opposite side
Previous baseline scores
Wrist ulnar deviation
Wrist flexion and extension
Forearm pronation and supination
Grip strength
Pain score and symptom location
Sport or task demands
Evidence level: Level 2, related or closest available reference values.
A practical reference for wrist radial deviation is approximately 15–20 degrees. Use this as a guide only. Because radial deviation is a smaller movement, side-to-side comparison and progress across sessions are often more useful than a single reference value.
Wrist ROM can be measured with smartphone-based and inclinometer-based tools when the setup is standardised. Recent wrist ROM research supports the use of smartphone and wearable-sensor approaches for wrist and forearm motion measurement, but also highlights the importance of consistent positioning, repeated familiarisation and measurement control.
For radial deviation, reliability depends heavily on forearm fixation, third metacarpal alignment, avoiding wrist flexion/extension drift and repeating the same active or passive method.
Common errors include allowing the forearm to rotate, moving into wrist flexion or extension, using inconsistent third metacarpal alignment, allowing finger movement, changing forearm support between sessions and confusing radial deviation with ulnar deviation.
A key limitation is that radial deviation has a relatively small range. Small errors in setup or device placement can create meaningful differences in the recorded score.
Use the Wrist Radial Deviation Test to monitor side-to-side wrist mobility, track response to mobility or loading programmes and add context to gripping, racquet sports, golf, climbing, manual work and upper-limb loading.
It is most useful when paired with ulnar deviation, wrist flexion/extension, forearm rotation and grip strength testing.
Record the side tested, radial deviation angle, active or passive method, pain score, symptom location, forearm position, whether the forearm was supported, third metacarpal alignment, compensation notes, comparison side and retest date.
Useful compensation notes may include forearm rotation, wrist flexion drift, wrist extension drift, finger movement, elbow movement, pain-limited range or apprehension.
Wrist Ulnar Deviation Test
Wrist Flexion Test
Wrist Extension Test
Elbow Pronation Test
Elbow Supination Test
Grip Strength Test
Push-Up Test
Closed Kinetic Chain Upper Extremity Test
It measures how far the wrist moves toward the thumb side.
A practical reference is approximately 15–20 degrees, but this should be interpreted with side comparison, symptoms and the client’s activity demands.
Radial deviation is a small-range movement, so minor changes in device placement, forearm position or compensation can affect the score.
No. Radial deviation moves the wrist toward the thumb side, while ulnar deviation moves it toward the little-finger side.
Yes. Active and passive ROM provide different information and should not be compared as the same test.
The Wrist Radial Deviation Test measures thumb-side wrist movement.
Align the device with the third metacarpal.
Keep the forearm fixed and avoid rotation.
Use 15–20 degrees as practical context, not a strict rule.
Track symptoms, side comparison and progress in Measurz.
Engstrand, F., Tesselaar, E., Gestblom, R., & Farnebo, S. (2021). Validation of a smartphone application and wearable sensor for measurements of wrist motions. Journal of Hand Surgery (European Volume), 46(10), 1057–1063.
Ge, M., Chen, J., Zhu, Z., Shi, P., Yin, L., & Xia, L. (2020). Wrist ROM measurements using smartphone photography: Reliability and validity. Hand Surgery and Rehabilitation, 39(4), 261–264.
Kiatkulanusorn, S., Luangpon, N., Srijunto, W., Watechagit, S., Pitchayadejanant, K., Kuharat, S., Anwar Bég, O., & Paepetch Suato, B. (2023). Analysis of the concurrent validity and reliability of five common clinical goniometric devices. Scientific Reports, 13, 20915.
