Six-minute walk test

Category: Lung & Breathing Tests · All lung & breathing tests

What it is

The six-minute walk test measures how far you can walk on a flat corridor in six minutes at your own fastest comfortable pace, with oxygen levels and heart rate monitored. It reflects real-world exercise capacity in heart and lung disease.

Why it is done

It is used to assess severity and track progress in COPD, pulmonary hypertension, heart failure and interstitial lung disease, to evaluate response to treatments and rehabilitation, and in transplant assessment.

How to prepare

Wear comfortable shoes and clothes; bring your usual walking aids and inhalers. Avoid a heavy meal beforehand. Tell the team about joint pain, chest pain history and any oxygen use — the test may be done with your usual oxygen.

What happens during the procedure

After resting measurements (blood pressure, pulse, oxygen, breathlessness score), you walk back and forth along a marked flat course for six minutes, with standardised encouragement each minute. You may slow down or rest standing if needed; the clock keeps running. Oxygen and symptoms are recorded throughout.

Afterwards — recovery & results

You recover seated while observations are repeated. Results (distance walked, oxygen dips, symptoms) are compared with previous tests to judge change and are discussed in clinic.

Risks & considerations

Risks are low: breathlessness and fatigue are expected, and the test is stopped for chest pain, severe breathlessness, dizziness or oxygen falling below the safety threshold set by your team.

Related guides on MedicalVideos.com

Condition guide: asthma

Frequently asked questions

Why six minutes?

It is long enough to stress the system meaningfully but short enough for most patients, and decades of standardisation make distances comparable between visits and centres.

My distance improved after rehab — is that real?

Yes — improvements beyond a threshold (around 30 metres in many lung conditions) are considered meaningful and reflect genuine gains in function.

Related procedures — Lung & Breathing Tests

Bronchoscopy Cardiopulmonary exercise test (CPET / CPEX)Chest drain insertion FeNO test (exhaled nitric oxide)Full lung function tests (PFTs with gas transfer)Methacholine challenge test (bronchial provocation)

Browse the S section of the A–Z list or return to the Procedures & Tests hub.

Please note: This page is educational information about a medical procedure or test. It does not replace the instructions of your own care team, who know your situation and whose preparation, fasting and medication advice you should follow if it differs from anything here. If you have symptoms that worry you, or an appointment you do not understand, contact your clinical team.