A client recovering from illness, surgery or a long period of inactivity may not be ready for a maximal running test.
Instead, a six-minute walk can provide practical information about functional endurance, pacing and tolerance to sustained activity.
The result is easy to understand: how far the client can walk in six minutes.
Test name: 6-Minute Walk Test
Also known as: 6MWT
Purpose: Assess functional exercise capacity and walking endurance
What it assesses: Distance walked in six minutes
Equipment required: Measured walking course, cones, stopwatch, chair and recording system
Key finding: Total distance walked in metres
Best used with: RPE, heart rate, oxygen saturation where appropriate, symptoms and gait notes
Key limitation: Influenced by motivation, walking speed, course layout, symptoms, comorbidities and assistive device use
The 6MWT is a self-paced walking test.
The client walks as far as possible in six minutes along a measured course. The primary score is the total distance walked in metres.
It is not a maximal running test. It reflects functional walking capacity and is commonly used in older adult, rehabilitation, cardiopulmonary and deconditioning settings.
The American Thoracic Society and European Respiratory Society have published guidance on standardised field walking tests, including the 6MWT. These standards highlight the importance of consistent instructions, course setup, encouragement and monitoring. ()
The 6MWT is used when walking capacity is more relevant than running performance.
It can help professionals:
Monitor functional endurance
Track return to walking
Assess tolerance to sustained activity
Record symptoms during exertion
Compare progress over time
Support goal setting
Add context to fatigue, breathlessness or reduced mobility
It is especially useful when maximal running tests are too demanding or not relevant to the client’s daily function.
The primary measure is total distance walked in six minutes.
The result may reflect:
Walking endurance
Functional aerobic capacity
Pacing
Lower-limb capacity
Balance confidence
Symptom tolerance
Gait efficiency
It does not isolate VO₂max, diagnose a condition or explain the cause of reduced walking distance on its own.
A reduced distance may be influenced by pain, breathlessness, balance, fatigue, low confidence, assistive device use, cardiovascular response or respiratory symptoms.
The 6MWT may be useful for:
Older adults
Deconditioned clients
Clients returning to activity
Clients where walking capacity is more relevant than running capacity
Clients with reduced functional endurance
Clients being monitored after illness, surgery or prolonged inactivity
Rehabilitation and general fitness settings
For clients with cardiopulmonary symptoms, significant medical history or abnormal vital signs, appropriate screening and supervision are important.
You will need:
Flat measured walking course
Cones or markers
Stopwatch
Chair for rest if needed
Measurz or MAT recording system
Optional heart rate monitor
Optional pulse oximeter where appropriate
RPE or breathlessness scale
A 30 m indoor corridor is commonly described in formal protocols, although practical settings may use a different standardised course. If a different course is used, record it clearly.
Set up a flat, measured walking course.
Record the course length and number of turns.
Screen for safety and confirm that the client is appropriate for a six-minute walking assessment.
Record baseline symptoms and optional measures such as:
Heart rate
Oxygen saturation
RPE
Breathlessness
Pain
Explain the task:
“Walk as far as you can in six minutes. You may slow down, stop or rest if needed, but the timer will continue.”
Start the timer and instruct the client to begin walking.
Use consistent encouragement and time updates if following a formal protocol.
At six minutes, stop the test and record the total distance walked.
After the test, record:
Symptoms
RPE
Heart rate
Oxygen saturation if used
Rest breaks
Gait observations
Reason for stopping if relevant
Use the same course, instructions and monitoring method for retesting.
The primary score is total distance walked in metres.
A greater distance generally suggests better functional walking capacity.
A reduced distance may reflect:
Deconditioning
Pain
Breathlessness
Poor balance
Low confidence
Fatigue
Pacing difficulty
Assistive device use
Health or medication factors
Interpretation is strongest when comparing the client with their own baseline under the same conditions.
Reference values exist for healthy adults and some clinical groups, but they vary by age, sex, height, body mass, health status and protocol.
One widely cited healthy adult study by Enright and Sherrill reported median 6MWT distances of 576 m for men and 494 m for women in adults aged 40–80 years. The authors also provided sex-specific prediction equations based on height, age and weight. ()
The American Thoracic Society summary page lists healthy adult normal values above age 30 as approximately 538.7–643 m, while also noting that reference equations are available. ()
For children and adolescents, reference values vary substantially between studies and countries. A systematic review found large variation in paediatric 6MWT reference values and noted that many studies used 30 m corridors and ATS-style protocols. ()
Use reference values only when the protocol and population are similar.
For most Measurz use, interpret results using:
The client’s own baseline
Repeat testing under the same conditions
Matched reference equations where appropriate
Symptoms and RPE
Heart rate and oxygen saturation where used
Assistive device and course setup
Functional goals
The 6MWT is widely used and supported by ATS/ERS technical standards. These standards note that field walking tests, including the 6MWT, are valid, reliable and responsive to change in chronic respiratory disease when performed using standardised protocols. ()
The ATS summary also reports strong test-retest reliability across several respiratory populations, including COPD ICC values from 0.88 to 0.99. ()
A meaningful change depends on the population.
Reported minimal important difference values vary, including:
COPD: approximately 25–33 m
Non-CF bronchiectasis: approximately 25 m
Idiopathic pulmonary fibrosis: approximately 21.7–45 m
Lung cancer: approximately 22–42 m
These values should not be applied universally to all clients. ()
Sensitivity and specificity are not applicable for routine Measurz use.
The 6MWT is a functional performance test, not a stand-alone diagnostic test.
It can help monitor walking capacity and functional endurance, but it does not diagnose a condition.
Common errors include:
Changing the course length
Using inconsistent encouragement
Not recording rest breaks
Failing to record assistive device use
Comparing results across different settings
Not recording symptoms or RPE
Ignoring oxygen saturation when it is clinically relevant
Comparing results to mismatched reference values
Key limitations include:
Motivation affects distance
Course length and turns affect performance
Pain or breathlessness may limit walking
Learning effect can occur
Assistive device use changes interpretation
It does not explain the cause of reduced distance
Formal guidance notes a learning effect, so two tests may be performed when accurate baseline assessment is important, with the better distance reported. ()
Use the 6MWT to:
Track functional endurance
Monitor return to walking
Compare pre- and post-intervention performance
Assess tolerance to sustained activity
Support goal setting
Monitor symptoms during exertion
Provide a walking-based alternative to running tests
It is especially useful when running tests are too demanding or not relevant.
In Measurz, record:
Total distance
Course length
Number of turns
Assistive device
Footwear
Rest breaks
Heart rate
RPE
Breathlessness
Oxygen saturation if used
Pain score
Symptoms
Gait notes
Safety concerns
Reason for stopping if relevant
Example note:
“6MWT completed on 30 m indoor course. Total distance: 472 m. No walking aid. RPE 6/10. Peak HR 128 bpm. SpO₂ 96% to 93%. One brief rest at 4:20. Mild breathlessness, no pain.”
2-Minute Step-in-Place Test
Cooper 12-Minute Run Test
Time Trial Test
Beep Test
Fatigue
Respiratory Rate
Pulse Rate
Blood Pressure
Walking speed or gait assessment
It measures the distance a client can walk in six minutes, providing a practical measure of functional exercise capacity.
No. It is usually considered a self-paced functional walking test, although it can still be demanding for some clients.
Yes. They may slow or rest if needed, but the timer continues.
Normal values vary by age, sex, height, body mass and protocol. Healthy adult reference values are often around 500–600 m, but matched equations and individual baseline are more useful.
Record symptoms, RPE, heart rate, oxygen saturation if used, assistive device, rest breaks, course length and gait notes.
The 6MWT measures distance walked in six minutes.
It is useful for functional endurance and walking capacity.
Reference values vary by age, sex, body size and protocol.
Meaningful change thresholds are population-specific.
Measurz should record distance, symptoms, course setup and monitoring data.
ATS Committee on Proficiency Standards for Clinical Pulmonary Function Laboratories. (2002). ATS statement: Guidelines for the six-minute walk test. American Journal of Respiratory and Critical Care Medicine, 166(1), 111–117. https://doi.org/10.1164/ajrccm.166.1.at1102
Bohannon, R. W., & Crouch, R. (2017). Minimal clinically important difference for change in 6-minute walk test distance of adults with pathology: A systematic review. Journal of Evaluation in Clinical Practice, 23(2), 377–381. https://doi.org/10.1111/jep.12629
Enright, P. L., & Sherrill, D. L. (1998). Reference equations for the six-minute walk in healthy adults. American Journal of Respiratory and Critical Care Medicine, 158(5), 1384–1387. https://doi.org/10.1164/ajrccm.158.5.9710086
Holland, A. E., Spruit, M. A., Troosters, T., Puhan, M. A., Pepin, V., Saey, D., McCormack, M. C., Carlin, B. W., Sciurba, F. C., Pitta, F., Wanger, J., MacIntyre, N., Kaminsky, D. A., Culver, B. H., Revill, S. M., Hernandes, N. A., Andrianopoulos, V., Camillo, C. A., Mitchell, K. E., ... Singh, S. J. (2014). An official European Respiratory Society/American Thoracic Society technical standard: Field walking tests in chronic respiratory disease. European Respiratory Journal, 44(6), 1428–1446. https://doi.org/10.1183/09031936.00150314
Mylius, C. F., Paap, D., Takken, T., & others. (2016). Reference value for the 6-minute walk test in children and adolescents: A systematic review. Expert Review of Respiratory Medicine, 10(12), 1335–1352. https://doi.org/10.1080/17476348.2016.1258305
