The Grip Strength Bent Arm Wrist Flexed Test measures how much grip force a client can produce while the elbow is bent and the wrist is held in flexion. Wrist flexion means the palm side of the hand moves closer to the forearm. This variation may be useful when a professional wants to understand grip force in a less mechanically advantaged wrist position or in a position that resembles certain sport, work, gym, climbing, grappling, tool-use or manual handling tasks.

A gripper is used to measure handgrip force during maximal or repeated gripping assessments. When used on its own, a gripper primarily measures peak grip force, which is the highest force value produced during the test. When gripper data are recorded with Measurz, results can be used to support peak force, side-to-side comparison, repeated-trial comparison, progress tracking, force relative to body mass, fatigue or repeated-effort monitoring where the protocol supports it, and time-based force analysis where compatible data are available.

For most routine bent-arm wrist-flexed grip tests, peak grip force is usually the main metric. Best trial, average force, side-to-side difference, dominant versus non-dominant comparison and grip strength as a percentage of body weight may also be useful. Fatigue index should only be used if repeated or sustained gripping efforts are part of the protocol.

The result can support assessment reasoning and progress tracking, but it does not diagnose hand, wrist, elbow or shoulder pain, confirm pathology, explain symptoms on its own, clear sport participation, clear work duties or replace professional judgement.

What Is the Grip Strength Bent Arm Wrist Flexed Test?

The Grip Strength Bent Arm Wrist Flexed Test is a maximal isometric grip assessment performed with the elbow bent and the wrist positioned in flexion. The client squeezes the gripper as hard as possible while maintaining the same shoulder, elbow, forearm, wrist and hand position.

This test primarily measures grip force output in a specific bent-arm, wrist-flexed setup. It reflects the combined contribution of the finger flexors, thumb position, wrist and forearm stabilisers, elbow position, shoulder position, hand size, grip span, effort quality and confidence.

The wrist-flexed position is different from standard handgrip testing, which usually keeps the wrist near neutral or slight extension. Because wrist position can strongly affect grip force, wrist-flexed results should be compared with wrist-flexed retests rather than directly compared with neutral-wrist, wrist-extended, straight-arm or overhead protocols.

Consistent setup matters because small changes in wrist flexion angle, handle setting, elbow angle, forearm position, shoulder position, grip span, hand dominance and instructions can change the result.

This test does not fully measure hand function, dexterity, endurance, pain source, tissue status, sport performance, work capacity or whole upper-limb strength on its own.

Step-by-Step Protocol / Practice

1. Prepare the client

Explain that the test measures how strongly they can squeeze the gripper while the elbow is bent and the wrist is flexed. Record baseline symptoms, hand pain, wrist pain, forearm symptoms, elbow symptoms, shoulder symptoms, paraesthesia, recent gripping workload, recent training load, sport exposure, work exposure and confidence with maximal gripping.

Ask which hand is dominant. Record whether the dominant or non-dominant hand is tested first.

Use 1–2 submaximal practice trials before maximal testing so the client understands the wrist-flexed position, handle setting and effort required.

2. Set the client position

Use a repeatable position such as:

• Client seated upright
• Shoulder relaxed and close to the body
• Elbow flexed to approximately 90 degrees
• Forearm position recorded as neutral, pronated or supinated
• Wrist flexed to a recorded angle
• Hand holding the gripper without changing wrist flexion during the squeeze
• Feet supported if seated
• Trunk upright and still

Record the exact position used. If a standing protocol is used, record that separately and do not compare it directly with seated results unless the same protocol is repeated.

3. Set up the gripper

Use the same gripper device for baseline and retesting. Record the device type and whether it reports force in kilograms, pounds, Newtons or another unit.

Check that the gripper is functioning correctly and that the display or recording system is ready before each trial.

When recording with Measurz, document:

• Test name
• Hand tested
• Hand dominance
• Shoulder position
• Elbow position
• Forearm position
• Wrist flexion angle or description
• Handle setting
• Number of trials
• Contraction duration
• Rest period
• Peak force
• Symptoms
• Notes about compensation or invalid trials

4. Set the handle position

Set the gripper handle to a consistent span. Handle setting is one of the most important parts of grip testing because a setting that is too narrow or too wide can reduce force output.

Record:

• Handle setting number or distance
• Whether the same setting is used for both hands
• Whether the setting is adjusted for hand size
• Whether the setting is repeated at retest

If the client has smaller hands, larger hands, pain, stiffness or difficulty reaching the handle while the wrist is flexed, record the chosen setting clearly.

5. Stabilise the position

Ask the client to keep the elbow bent, forearm position steady and wrist flexed at the chosen angle. The shoulder should stay relaxed and the trunk should not lean.

Watch for:

• Wrist moving out of flexion
• Extra wrist flexion during the squeeze
• Wrist extension during the squeeze
• Wrist deviation
• Forearm rotation
• Elbow lifting or dropping
• Shoulder hiking
• Trunk leaning
• Breath holding
• Pain-related guarding
• Gripper slipping

The aim is a controlled maximal grip effort in the same bent-arm wrist-flexed position each time.

6. Give clear instructions

Use consistent instructions such as:

“Hold your wrist in this flexed position.”
“Keep your elbow bent and close to your side.”
“When I say go, squeeze as hard as you can.”
“Keep squeezing until I say stop.”
“Keep your wrist and arm position still.”
“Keep breathing.”
“Tell me if you feel pain, tingling, numbness, cramping or anything unusual.”

Use the same wording at retest where possible.

7. Record trials

A practical routine protocol is:

• 1–2 practice trials per hand
• 2–3 recorded maximal trials per hand
• Each maximal squeeze held for approximately 3–5 seconds
• 30–60 seconds rest between maximal trials
• Longer rest if fatigue, pain, wrist discomfort or cramping occurs

Record either the best trial or the average of recorded trials. Best trial is commonly useful for maximal grip strength. Average force may be useful when repeated trials are used to reduce the influence of one unusually high or low attempt.

Use the same scoring method at retest.

8. Identify invalid trials

Repeat or mark a trial as invalid if:

• The wrist moves out of the selected flexed position
• The wrist extends during the squeeze
• The forearm rotates unexpectedly
• The elbow angle changes
• The shoulder lifts or braces
• The trunk leans
• The gripper slips
• The handle setting changes
• The client starts before the recording is ready
• Pain, tingling, numbness or cramping limits effort
• The client does not understand the task
• The effort is clearly submaximal

9. Record symptoms

Record hand, wrist, forearm, elbow or shoulder symptoms during and after testing. Also record tingling, numbness, cramping, skin discomfort, callus discomfort, apprehension and confidence.

Do not repeatedly test through worsening symptoms, significant paraesthesia, strong pain or severe cramping.

For retesting, match the same device, handle setting, hand order, shoulder position, elbow angle, forearm position, wrist flexion angle, contraction duration, rest period, scoring method and symptom recording.

Why It Is Used

The Grip Strength Bent Arm Wrist Flexed Test may be useful for:

• Baseline grip strength assessment in a wrist-flexed position
• Right-left comparison
• Dominant versus non-dominant hand comparison
• Progress tracking
• Strength profiling
• Monitoring change over time
• Client education
• Comparing neutral-wrist and wrist-flexed grip force
• Sport contexts where gripping occurs with wrist flexion
• Workplace contexts involving gripping tools, carrying, lifting, pulling, pushing, manual handling or repeated hand tasks
• Fitness and performance contexts
• Comparing grip force with wrist, elbow and shoulder strength tests
• Comparing absolute grip force with grip strength as a percentage of body weight

This test should support assessment reasoning. It should not be used as a stand-alone diagnostic, clearance or performance-prediction tool.

What It Measures

The test primarily measures grip force output in a bent-arm, wrist-flexed position.

It may provide useful information about:

• Maximal grip force
• Right-left difference
• Dominant versus non-dominant hand difference
• Grip force relative to body weight
• Change from baseline
• Confidence with gripping in a wrist-flexed position
• Symptom response during wrist-flexed gripping
• Repeated-trial consistency
• Grip force compared with neutral-wrist or wrist-extended positions

It does not fully measure:

• Hand function
• Dexterity
• Endurance, unless a repeated or sustained protocol is used
• Work capacity
• Sport performance
• Pain source
• Tendon status
• Nerve function
• Readiness for sport or work

Understanding the Result, Reference Values and What to Look For

What a higher or lower result may suggest

A higher score may suggest greater grip force output in that specific bent-arm wrist-flexed test setup. A lower score may suggest reduced grip force output, but the reason should be interpreted carefully.

Lower grip force may be influenced by pain, apprehension, poor familiarisation, fatigue, guarding, poor positioning, wrist flexion angle, elbow position, shoulder position, hand dominance, handle setting, grip span, device type, skin discomfort, callus discomfort, grip friction, breath holding, client confidence, motivation and effort.

One result should not be interpreted in isolation. Interpretation is strongest when the same setup is repeated over time. The result should be interpreted alongside symptoms, confidence, hand dominance, wrist position, sport or work demands, related tests and functional goals.

What can influence the result

Important influences include:

• Pain
• Apprehension
• Poor familiarisation
• Fatigue
• Guarding
• Poor positioning
• Wrist flexion angle
• Elbow position
• Shoulder position
• Forearm position
• Hand dominance
• Handle setting
• Grip span
• Device type
• Skin discomfort
• Callus or grip friction
• Breath holding
• Client confidence
• Motivation and effort
• Recent training or manual workload
• Whether wrist flexion is actively held or passively positioned

Body weight percentage reference context

Approximate grip strength as a percentage of body weight:

• Adult men: approximately 55–70% body weight
• Adult women: approximately 35–50% body weight
• Older men: approximately 40–60% body weight
• Older women: approximately 25–40% body weight
• Strength-trained or grip-dominant sport clients: may score higher depending on body size, sport, training history and protocol

These values should be used as context, not pass/fail scores.

Standard handgrip research shows that grip strength is usually higher in men than women and generally declines with age. Wrist position also matters, and grip force is commonly reduced when the wrist moves away from a more mechanically favourable neutral or slightly extended position.

For this test, the strongest comparisons are usually:

• The client’s own baseline
• Right versus left hand
• Dominant versus non-dominant hand
• Grip strength as percentage of body weight
• Repeated tests using the same wrist-flexed setup
• Symptoms during testing
• Sport, work or training demands
• Related wrist, elbow and shoulder tests

Reference values can help provide context, but they should not be used as diagnostic, clearance or pass/fail cut-offs.

Normative, reference and comparative values

Published reference values for this exact bent-arm wrist-flexed gripper protocol are limited. Most widely used handgrip reference values come from Jamar-style dynamometry using seated testing, elbow flexed to 90 degrees, shoulder adducted and neutrally rotated, forearm neutral and wrist near neutral or slight extension.

Closest available reference data include:

• Research on wrist position and grip strength shows that grip strength is reduced when the wrist deviates from an optimal or comfortable position. This means wrist-flexed grip should not be expected to match neutral-wrist grip values.
• Standard handgrip protocols often place the wrist near neutral or slight extension, not flexion. Therefore, standard handgrip norms should be used only as broad context for this test.
• Large adult handgrip datasets show that grip strength is influenced by age, sex, hand dominance and body size, but those data generally do not use a wrist-flexed protocol.
• Adult grip strength commonly peaks in young to middle adulthood and tends to decline with older age.
• Men generally produce higher absolute grip force than women in population datasets.
• The dominant hand is often stronger, but the size of this difference varies by person, sport, work exposure and protocol.
• Device type matters. Hydraulic, electronic and spring-based grippers may not produce directly interchangeable values.
• Because this protocol uses a bent arm and wrist-flexed position, interpretation should rely more heavily on baseline comparison, side-to-side comparison, repeated testing, symptoms, confidence and setup consistency.

Practical interpretation priorities

Use this order:

1. Compare with the client’s own baseline.
2. Compare right and left hands where relevant.
3. Consider hand dominance.
4. Consider grip strength relative to body weight.
5. Consider symptoms during and after testing.
6. Consider confidence and effort quality.
7. Review whether compensations were present.
8. Compare with related upper-limb, shoulder, elbow, wrist or pinch strength tests.
9. Relate the result to the client’s sport, work, exercise or daily-life demands.
10. Retest under the same conditions to monitor change.
11. Do not use reference values as pass/fail criteria.

What to look at for each relevant gripper or Measurz metric

Peak force
Use for maximum grip force output, baseline grip strength, right-left comparison, dominant versus non-dominant hand comparison, progress tracking and comparing force across retests.

Look for best score or average score, consistent handle setting, consistent wrist flexion angle, consistent body position, side-to-side difference, change from baseline, grip force as percentage of body weight, pain or compensation during maximal effort.

Average force
Use for summarising repeated trials, reducing the influence of one unusually high or low attempt and tracking consistent grip output.

Look for whether repeated trials are consistent, whether one trial is unusually high or low, whether average force changes over time and whether fatigue affects later trials.

Force relative to body mass
Use for providing context across different body sizes and for sport, workplace or performance contexts where relative strength matters.

Look for grip force expressed as percentage of body weight, whether absolute force and percentage of body weight tell a different story, whether body-size context matters for the client’s goal and whether percentage of body weight improves over time using the same setup.

Side-to-side difference
Use for right-left comparison, dominant versus non-dominant hand comparison and monitoring asymmetry over time.

Look for whether one hand is consistently lower, whether the difference is expected due to dominance, sport or work demands, whether symptoms, confidence or recent injury influence one side and whether the same position was maintained on both sides.

Time to peak
Use when the device captures how long it takes the client to reach peak grip force.

Look for delayed peak force, faster time to peak across retests and whether a slower time reflects caution, pain, poor cueing or performance differences.

Rate of force development
Use when rapid grip force matters, such as sport, tactical, workplace or performance contexts.

Look for early force production, whether rapid grip output changes over time, whether rate of force development improves while peak force stays similar and whether confidence and familiarisation influence the result.

Assessing and Providing Context for Different Client Populations

Youth clients
Consider growth, maturation, hand size, coordination, attention, training age, grip span, wrist control and familiarisation. Handle setting is especially important because smaller hands may not suit the same grip span as adults.

Adults and general fitness clients
Use the test for baseline strength, progress tracking, grip strength as percentage of body weight, confidence with gripping tasks and comparison with neutral-wrist grip testing.

Older adults
Grip strength can provide useful context for carrying, opening objects, general physical capacity and daily tasks. For wrist-flexed testing, also consider wrist comfort, fatigue, confidence and whether the position is tolerated.

Athletes and sport clients
Relevant sports may include climbing, grappling, martial arts, racquet sports, gymnastics, rowing, weightlifting and field or court sports. Peak grip force alone does not equal sport performance, but it can support a broader strength profile.

Workplace and manual task clients
Consider occupational demands such as gripping tools, carrying, lifting, pulling, pushing, manual handling and repeated hand tasks. Do not use one score to clear work duties.

Clients returning after injury
Use the test to monitor grip force output, confidence, symptom response and comparison with the opposite side. Strength alone should not confirm readiness.

Clients with pain or persistent symptoms
Pain, fear, guarding, fatigue, apprehension and confidence may reduce grip force. Wrist flexion may also influence hand, wrist or forearm symptoms. Record symptoms and compare the result with related tests.

Higher body mass clients
Absolute force and force relative to body mass may both be useful. Avoid assumptions based on body size and interpret results in relation to the client’s goals, symptoms and task demands.

Smaller hands or different hand sizes
Handle setting, grip span and hand size can strongly influence results. Wrist flexion may make some handle settings feel harder to reach, so record the chosen setting clearly.

Reliability, Validity and Measurement Considerations

Repeatability improves when the same setup is used each time. Standardise and record:

• Same test position
• Same device
• Same handle setting
• Same grip span
• Same hand tested first
• Same hand dominance recording
• Same shoulder position
• Same elbow position
• Same forearm position
• Same wrist flexion angle
• Same instructions
• Same contraction duration
• Same rest period
• Same scoring method
• Same symptom and compensation recording

Standard handgrip protocols often use elbow flexion around 90 degrees, forearm neutral and wrist near neutral or slight extension. Because this test uses a wrist-flexed position, results should be tracked against the same wrist-flexed setup rather than compared directly with standard neutral-wrist norms.

Common Errors and Limitations

Common errors include:

• Inconsistent handle setting
• Inconsistent wrist flexion angle
• Wrist extending during the squeeze
• Excessive wrist flexion during the squeeze
• Wrist deviation
• Inconsistent elbow position
• Forearm rotation
• Shoulder compensation
• Trunk leaning
• Breath holding
• Poor familiarisation
• Testing too quickly between trials
• Comparing wrist-flexed and neutral-wrist tests directly
• Treating the score as a diagnosis
• Ignoring hand dominance
• Ignoring hand size or grip span

Limitations include:

• Testing is setup-dependent.
• Grip strength does not fully represent hand function.
• Grip strength does not fully represent sport performance.
• Grip strength does not fully represent work capacity.
• Pain, fear or guarding can reduce force output.
• Peak force does not measure endurance, dexterity or coordination.
• Published norms are not universal across devices or protocols.
• Wrist-flexed values should not be treated as identical to neutral-wrist or wrist-extended values.
• Wrist position may influence the result even when hand strength has not changed.

Practical Applications

The Grip Strength Bent Arm Wrist Flexed Test may be useful for:

• Baseline grip strength assessment in a wrist-flexed position
• Right-left comparison
• Dominant versus non-dominant comparison
• Progress tracking
• Strength profiling
• Client education
• Comparing wrist-flexed and neutral-wrist grip capacity
• Sport preparation
• Workplace context
• Monitoring response to exercise or intervention
• Comparing with pinch, wrist, elbow or shoulder tests
• General physical capacity context
• Comparing absolute grip force with grip strength as percentage of body weight
• Comparing task-specific grip positions where appropriate

Ideas to Make the Result Better

If grip force is low on both sides, consider assessing handle setting, grip span, familiarisation, wrist flexion angle, wrist extension strength, wrist flexion strength, elbow strength, shoulder position, general strength and recent workload.

If one hand is much lower, compare with hand dominance, symptoms, previous injury, sport demands, work exposure, wrist strength, pinch strength and shoulder or elbow findings.

If wrist-flexed grip is much lower than neutral-wrist grip, consider whether this reflects expected wrist-position differences, discomfort, reduced wrist control, forearm fatigue, task familiarity or symptoms.

If body weight percentage is low, consider whether absolute force, body size, training history, work demands and client goals tell the same story.

If pain limits the result, record the symptom location, review the wrist position and compare with related findings rather than forcing repeated maximal trials.

If grip force is good but function is limited, consider assessing dexterity, endurance, pinch strength, wrist range of motion, elbow strength, shoulder strength, confidence and task-specific demands.

If fatigue appears quickly, consider whether repeated gripping, sustained holds, rest periods, workload, sleep, recovery or symptoms are influencing performance.

If the client is improving, keep the same setup and monitor whether grip force, symptoms, confidence and task tolerance improve together.

Recommended Standard Protocol Summary

Position: Seated upright or chosen repeatable position
Shoulder position: Relaxed, close to body unless another position is intentionally selected
Elbow position: Bent, commonly around 90 degrees
Forearm position: Record neutral, pronated or supinated
Wrist position: Flexed to a recorded angle
Hand tested: Record right, left and dominance
Handle setting: Record gripper handle setting or grip span
Trials: 1–2 practice trials, then 2–3 recorded maximal trials per hand
Contraction duration: 3–5 seconds
Rest: 30–60 seconds between maximal trials
Metric: Peak force, with average force if repeated-trial summary is used
Additional context: Side-to-side difference, dominance, grip force as percentage of body weight, symptoms, confidence and wrist position
Final score: Best trial or average of recorded trials
Key retesting requirement: Same device, handle setting, body position, elbow position, forearm position, wrist flexion angle, instructions, contraction duration, rest and scoring method

FAQs

What does this test measure?

It measures maximal grip force in a bent-arm, wrist-flexed position.

What does wrist flexed mean?

Wrist flexed means the palm side of the hand moves closer to the forearm. The exact angle should be recorded so the test can be repeated.

Is this the same as a standard grip strength test?

No. Many standard handgrip protocols use the wrist near neutral or slight extension. This test uses a wrist-flexed position, so results should be compared with the same wrist-flexed setup.

Why might wrist-flexed grip be lower than neutral-wrist grip?

Wrist position changes the length and mechanical advantage of the muscles involved in gripping. Research shows grip strength is reduced when the wrist moves away from a more optimal position.

Why use body weight percentage?

Grip strength as a percentage of body weight can provide useful context across different body sizes. It should support interpretation, not act as a pass/fail score.

What does the gripper measure by itself?

A gripper primarily measures peak grip force during the squeeze. With Measurz, results can also support side-to-side comparison, repeated-trial comparison, progress tracking and force relative to body mass.

Can this test diagnose hand, wrist or elbow pain?

No. It can measure grip force and symptom response, but it does not diagnose a condition or explain symptoms on its own.

Should both hands be tested?

Yes, where appropriate. Testing both hands allows right-left and dominant versus non-dominant comparison.

What makes the test more repeatable?

Use the same gripper, handle setting, wrist flexion angle, elbow position, forearm position, hand order, instructions, contraction duration, rest period and scoring method.

Key Takeaways

• The Grip Strength Bent Arm Wrist Flexed Test measures maximal grip force with the elbow bent and wrist flexed.
• Peak grip force is usually the main routine metric.
• Wrist-flexed values should not be treated as interchangeable with neutral-wrist or wrist-extended values.
• Wrist flexion usually places the grip system in a less mechanically favourable position than neutral or slight wrist extension.
• Handle setting, grip span, wrist angle, elbow position and forearm position strongly influence the result.
• Grip strength as a percentage of body weight can provide useful context, but it is not a pass/fail score.
• The strongest comparisons are usually the client’s own baseline, right-left comparison and repeated testing using the same setup.
• Measurz should capture hand tested, dominance, wrist flexion angle, handle setting, peak force, symptoms, confidence, compensations and retesting conditions.

References

Bohannon, R. W. (1997). Reference values for extremity muscle strength obtained by hand-held dynamometry from adults aged 20 to 79 years. Archives of Physical Medicine and Rehabilitation, 78(1), 26–32. https://doi.org/10.1016/S0003-9993(97)90005-8

Dodds, R. M., Syddall, H. E., Cooper, R., Benzeval, M., Deary, I. J., Dennison, E. M., Der, G., Gale, C. R., Inskip, H. M., Jagger, C., Kirkwood, T. B. L., Lawlor, D. A., Robinson, S. M., Starr, J. M., Steptoe, A., Tilling, K., Kuh, D., & Sayer, A. A. (2014). Grip strength across the life course: Normative data from twelve British studies. PLoS ONE, 9(12), e113637. https://doi.org/10.1371/journal.pone.0113637

Kong, Y.-K., & Lowe, B. D. (2005). Evaluation of handle diameters and orientations in a maximum torque task. International Journal of Industrial Ergonomics, 35(12), 1073–1084. https://doi.org/10.1016/j.ergon.2005.04.008

Li, Z.-M. (2002). The influence of wrist position on individual finger forces during forceful grip. Journal of Hand Surgery, 27A(5), 886–896. https://doi.org/10.1053/jhsu.2002.35078

Mathiowetz, V., Kashman, N., Volland, G., Weber, K., Dowe, M., & Rogers, S. (1985). Grip and pinch strength: Normative data for adults. Archives of Physical Medicine and Rehabilitation, 66(2), 69–74.

O’Driscoll, S. W., Horii, E., Ness, R., Cahalan, T. D., Richards, R. R., & An, K. N. (1992). The relationship between wrist position, grasp size, and grip strength. Journal of Hand Surgery, 17A(1), 169–177. https://doi.org/10.1016/0363-5023(92)90136-D

Richards, L. G., Olson, B., & Palmiter-Thomas, P. (1996). How forearm position affects grip strength. American Journal of Occupational Therapy, 50(2), 133–138. https://doi.org/10.5014/ajot.50.2.133

Roberts, H. C., Denison, H. J., Martin, H. J., Patel, H. P., Syddall, H., Cooper, C., & Sayer, A. A. (2011). A review of the measurement of grip strength in clinical and epidemiological studies: Towards a standardised approach. Age and Ageing, 40(4), 423–429. https://doi.org/10.1093/ageing/afr051