A field sport athlete may need to improve plantar-flexion strength for sprinting and jumping demands. A runner may need stronger calf loading capacity to support training progression. A gym client may want a measurable way to track calf strength over time.
The Calf Raise Repetition Maximum Test provides a controlled way to assess loaded calf raise strength using a standardised standing calf raise, machine calf raise or other clearly defined loaded calf raise 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 Achilles tendon capacity, sprint performance, jump performance, running economy, injury risk or return-to-sport readiness.
Test name: Calf Raise Repetition Maximum Test
Purpose: Assess loaded calf raise strength
What it assesses: Plantar-flexion strength under a defined loaded calf raise setup
Equipment: Standing calf raise machine, Smith machine, leg press calf raise setup, external load or other standardised calf raise setup, Measurz for estimated 1RM calculation
Key finding: Load and repetitions completed, used by Measurz to calculate estimated 1RM
Best used with: Seated calf raise, calf endurance testing, ankle ROM, hop tests, sprint testing and lower-limb strength testing
Key limitation: It measures loaded calf raise strength, not complete calf, Achilles, running or jumping function
The Calf Raise Repetition Maximum Test measures the heaviest load a client can lift for a defined number of repetitions using a calf raise movement.
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:
Standing calf raise machine
Smith machine standing calf raise
Leg press calf raise
Loaded dumbbell calf raise
Barbell calf raise
Other standardised loaded calf raise 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 calf raise strength and track strength changes over time.
It may be useful for athletes, runners, gym clients, jumping athletes, field sport clients and lower-limb strength programmes where plantar-flexion strength is an important 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 loaded calf raise performance under the selected setup.
It may reflect:
Plantar-flexion strength
Loaded calf raise capacity
Load tolerance
Control through the selected ROM
Pain or symptom response
Estimated 1RM progress across training blocks
Training load progression
It does not measure Achilles tendon capacity, calf endurance, sprint performance, jump performance, ankle stiffness, foot control, balance, injury risk or sport readiness on its own.
This test may be useful for runners, field sport athletes, jumping athletes, gym clients, lower-limb strength clients and anyone completing calf-focused strength training.
It may not be appropriate when calf loading causes unacceptable pain, the client cannot maintain balance or control safely, the test cannot be performed through a repeatable ROM, symptoms increase during loaded plantar flexion, or the client is not ready for maximal or near-maximal repetition testing.
Standing calf raise machine, Smith machine, leg press calf raise setup or other standardised loaded calf raise setup
Load stack, plates, dumbbells or barbell depending on setup
Step, platform or machine footplate
Measurz for recording load, reps and estimated 1RM
Optional metronome
Optional video
Optional heel-height marker or ROM reference
Choose the calf raise setup
Decide whether the test will use a standing calf raise machine, Smith machine, leg press calf raise, dumbbells, barbell or another clearly defined setup.
Record the setup
Record machine type, foot position, stance width, foot angle, footwear, platform height, body position, hand support 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 include controlled lowering into the selected dorsiflexion range and a consistent rise into plantar flexion without bouncing, knee bending 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 calf raise 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 loaded calf raise strength under the tested setup, but it does not identify the cause. Pain, fatigue, ankle ROM, setup, foot placement, balance, confidence, recent training and tendon symptoms may all influence the result.
No universal normative value should be applied across calf raise setups and populations. Calf raise results vary by machine design, body position, knee position, foot platform, ROM, footwear, body size, training history and whether the 1RM is directly measured or estimated.
Use baseline comparison and progress across sessions as the primary benchmarks.
If using a unilateral version, 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 demands, ROM, calf endurance and related lower-limb tests.
Published heel-rise endurance values can provide useful plantar-flexor context, but they should not be used as direct reference values for loaded calf raise repetition maximum testing.
Common errors include changing foot position, using inconsistent ROM, bending the knees in a standing setup, bouncing out of the bottom position, shortening the top range, using momentum, changing tempo, testing while fatigued, not recording symptoms and comparing results across different machines or loading methods.
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 calf raise strength only. It does not fully assess Achilles tendon capacity, running performance, jumping ability, sprint ability, gait quality, balance or injury risk.
Use this test to monitor loaded calf strength, guide training loads and track response to calf-strengthening or lower-limb training 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 paired with seated calf raise, single-leg calf raise endurance, ankle ROM, hop tests, jump tests, sprint exposure, running assessment and symptom monitoring.
Record protocol type, machine or load setup, surface, footwear, support use, foot 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, knee bend, bouncing, excessive support use, cramping, Achilles discomfort, calf fatigue, pain-limited stop, tempo failure, balance loss 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 calf raise strength under the selected 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. A calf raise endurance test usually counts repeated bodyweight heel raises to fatigue.
Only cautiously. Machine design, stance, load method, foot position and ROM can 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 Calf Raise Repetition Maximum Test measures loaded calf raise strength.
Measurz calculates the estimated 1RM from the recorded load and reps.
The protocol must be clearly recorded because calf raise 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 calf, Achilles or running 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
Hébert-Losier, K., Wessman, C., Alricsson, M., & Svantesson, U. (2017). Updated reliability and normative values for the standing heel-rise test in healthy adults. Physiotherapy, 103(4), 446–452.
Monteiro, L., et al. (2025). Normative values for calf muscle strength-endurance in the general population using a validated single-leg heel-rise test. Journal of Orthopaedic & Sports Physical Therapy.
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.
