A gym client may want to track arm strength more objectively. A field sport athlete may need upper-limb strength monitoring as part of a broader programme. A client returning to loaded elbow flexion may need a simple way to monitor progress across training blocks.
The Bicep Curl Repetition Maximum Test provides a controlled way to assess elbow-flexion strength using a standardised dumbbell, barbell, cable or machine curl setup. Rather than requiring a true 1RM attempt, the test can be performed using a submaximal repetition maximum, such as a 3RM, 5RM, 8RM or 10RM. The load and reps are then entered into Measurz to calculate the estimated 1RM.
The result is useful for strength tracking, but it should not be interpreted as a complete measure of arm function, grip capacity, elbow health, shoulder function, injury risk or sport readiness.
The Bicep Curl Repetition Maximum Test measures the heaviest load a client can curl for a defined number of repetitions using a standardised bicep curl setup.
Depending on the protocol, this may be a 3RM, 5RM, 8RM, 10RM or another repetition maximum. The repetition target should be clearly recorded.
The test may be performed using:
Dumbbell bicep curl
Barbell bicep curl
EZ-bar curl
Cable curl
Machine curl
Preacher curl
Other standardised elbow-flexion setup
In Measurz, the professional records the load and completed repetitions. Measurz then calculates the estimated 1RM from that result. This estimated 1RM can be used to monitor progress over time and guide loading decisions.
If the client performs a true single-repetition maximum, the result should be labelled as a directly measured 1RM. If the result is calculated from a submaximal load and repetitions, it should be labelled as an estimated 1RM.
This test is used to assess loaded elbow-flexion strength and track strength changes over time.
It may be useful for gym clients, athletes, upper-limb strength programmes, general fitness assessments and training blocks where bicep curl strength is a meaningful monitoring variable.
It is especially useful when the professional wants a strength estimate without requiring a true maximal 1RM attempt. A submaximal RM test can be more practical for many clients while still giving a useful estimated 1RM through Measurz.
The test measures bicep curl performance under the selected setup.
It may reflect:
Loaded elbow-flexion strength
Bicep curl capacity
Arm strength progress
Load tolerance
Control through the selected ROM
Pain or symptom response
Estimated 1RM progress across training blocks
Training load progression
It does not measure complete upper-limb function, isolated biceps strength, tendon health, grip strength, shoulder function, pulling performance, injury risk or sport readiness on its own.
This test may be useful for gym clients, athletes, personal training clients, general fitness clients and anyone completing upper-limb strength training.
It may not be appropriate when elbow or shoulder loading causes unacceptable pain, the client cannot maintain a repeatable curl technique, the test cannot be performed through a consistent ROM, symptoms increase during loaded elbow flexion, or the client is not ready for maximal or near-maximal repetition testing.
Dumbbells, barbell, EZ-bar, cable machine, curl machine or preacher curl setup
Load stack or plates depending on setup
Measurz for recording load, reps and estimated 1RM
Optional metronome
Optional video
Optional bench or arm support depending on protocol
Choose the curl setup
Decide whether the test will use dumbbells, barbell, EZ-bar, cable, machine, preacher curl or another clearly defined setup.
Record the setup
Record equipment type, grip position, body position, elbow position, shoulder position, support used, ROM, tempo and load method.
Choose the repetition target
Select the repetition maximum target, such as 3RM, 5RM, 8RM or 10RM. Use the same target for retesting where possible.
Define valid ROM
Set a clear start and finish range. A valid repetition should use the same elbow-flexion range each time without trunk swing, shoulder movement, wrist collapse or shortened ROM.
Warm up
Complete light warm-up sets. Increase load gradually before testing.
Perform the test
Ask the client to complete the selected repetition maximum with controlled movement and the defined ROM.
Stop the attempt
Stop when the client reaches the target reps, cannot complete another valid rep, loses ROM, uses unacceptable compensation, reports limiting symptoms or cannot maintain control.
Record the maximum successful set
The score is the heaviest load completed for the target repetition range with acceptable technique and ROM.
Enter load and reps into Measurz
Record the completed load and repetitions in Measurz. Measurz calculates the estimated 1RM from the entered result.
Record the load, reps and exact bicep curl setup. Measurz uses the completed load and reps to calculate the estimated 1RM.
The estimated 1RM should be interpreted as an estimate, not the same as a directly tested 1RM. If a true 1RM was performed, label it as directly measured. If the result comes from a submaximal load and repetitions, label it as estimated.
Interpretation should include:
Absolute load
Completed repetitions
Estimated 1RM
ROM
Setup
Tempo
RPE
Pain or symptoms
Compensations
Previous baseline
A lower estimated 1RM may suggest reduced bicep curl strength under the tested setup, but it does not identify the cause. Pain, fatigue, elbow position, wrist position, grip, shoulder compensation, confidence, recent training and technique may all influence the result.
No universal normative value should be applied across bicep curl setups and populations. Bicep curl results vary by equipment type, grip, body position, elbow position, ROM, tempo, training history and whether the 1RM is directly measured or estimated.
Use baseline comparison and progress across sessions as the primary benchmarks.
If a single-arm version is also tested, side-to-side comparison can be useful, but it should not be treated as a strict pass/fail rule. A noticeable difference between sides should be interpreted alongside symptoms, training history, upper-limb function and related strength tests.
Common errors include using trunk swing, changing elbow position, moving the shoulder, shortening ROM, extending the wrist, changing grip, using momentum, changing tempo, testing while fatigued, not recording symptoms and comparing results across different curl setups.
A common recording error is failing to distinguish between a directly measured 1RM and an estimated 1RM. When load and reps are entered into Measurz, the result should be described as an estimated 1RM unless a true 1RM was directly tested.
The main limitation is that the test measures loaded bicep curl strength only. It does not fully assess grip strength, shoulder strength, pulling capacity, arm function, tendon capacity, sport performance or injury risk.
Use this test to monitor bicep curl strength, guide training loads and track response to upper-limb strengthening programmes.
The estimated 1RM can help track progress across training blocks, adjust loading and compare results across retests when the same setup is repeated.
It is most useful when interpreted alongside grip strength, pulling strength, shoulder strength, upper-limb symptoms, training load and movement quality.
Record protocol type, equipment used, grip position, body position, elbow position, ROM, tempo, load, reps, RM target, estimated 1RM, RPE, pain score, symptom location, compensation notes, reason for stopping and retest date.
Useful notes include shortened ROM, trunk swing, shoulder movement, elbow drift, wrist collapse, grip limitation, pain-limited stop, tempo failure, fatigue-limited attempt or setup change.
The key Measurz workflow is:
Enter the completed load
Enter the completed reps
Review the estimated 1RM calculated by Measurz
Record setup, ROM, symptoms, RPE and compensations
Use the same protocol for retesting
It measures loaded elbow-flexion strength under the selected bicep curl setup.
The professional enters the completed load and reps into Measurz. Measurz uses this information to calculate the estimated 1RM.
Not unless the client completed a true 1RM. If the result is based on load and multiple repetitions, it should be labelled as an estimated 1RM.
No. A repetition maximum test estimates maximal strength from load and reps. An endurance test usually counts repeated curls at a fixed load or within a fixed time.
Only cautiously. Dumbbell, barbell, EZ-bar, cable, machine and preacher curl setups can all change the score.
Yes. Pain score, symptom location, ROM and whether symptoms limited the result should be recorded.
No. A 3RM, 5RM, 8RM or 10RM may be more appropriate for many clients. Measurz can use load and reps to estimate 1RM.
The Bicep Curl Repetition Maximum Test measures loaded elbow-flexion strength.
Measurz calculates the estimated 1RM from the recorded load and reps.
The protocol must be clearly recorded because curl setups vary widely.
Do not treat an estimated 1RM as the same as a directly measured 1RM.
Do not treat the result as a complete upper-limb strength or function profile.
Record load, reps, setup, ROM, symptoms and RPE in Measurz.
Grgic, J., Lazinica, B., Schoenfeld, B. J., & Pedisic, Z. (2020). Test–retest reliability of the one-repetition maximum strength assessment: A systematic review. Sports Medicine - Open, 6, 31. https://doi.org/10.1186/s40798-020-00260-z
Hoeger, W. W. K., Hopkins, D. R., Barette, S. L., & Hale, D. F. (1990). Relationship between repetitions and selected percentages of one repetition maximum. Journal of Applied Sport Science Research, 4(2), 47–54.
Suchomel, T. J., Nimphius, S., Bellon, C. R., & Stone, M. H. (2018). The importance of muscular strength: Training considerations. Sports Medicine, 48(4), 765–785.
