Six-Minute Walk Test

The six-minute walk test measures how far a person can walk on a flat indoor course in six minutes, usually while a sensor tracks oxygen saturation and heart rate. It is a simple measure of everyday exercise capacity, used for lung diseases such as asbestosis and in deciding whether someone is fit for major surgery or a transplant.

Origin

Timed walk tests grew out of fitness testing in the 1960s and 1970s; a 12-minute version was adapted for lung patients and shortened to six minutes in the early 1980s. The American Thoracic Society published standard guidelines for the test in 2002.

Significance in Asbestos Context

Breathing tests such as spirometry and DLCO measure the lungs at rest; the walk test shows what a person can actually do and whether oxygen falls with activity. A short distance, or a fall in oxygen saturation to 88 percent or below, can support a prescription for supplemental oxygen and reflects real-life limits. Doctors use repeat tests to track asbestosis, measure progress in pulmonary rehabilitation, and help decide whether a patient can withstand major surgery for mesothelioma or be listed for a lung transplant. Results depend on effort, leg strength, heart disease, arthritis and other conditions, so they are read alongside other tests. Asbestos trusts generally rely on B-reads and pulmonary function tests rather than walk tests, but walk-test results can help show impairment in a lawsuit or disability claim.

Example Sentence

On his six-minute walk test he covered 290 meters, and his oxygen saturation fell from 94 to 86 percent, which supported a prescription for oxygen with exertion.

Related Terms

Oxygen Saturation, Supplemental Oxygen, Pulmonary Function Test (PFT), Diffusing Capacity (DLCO), Asbestosis, Surgical Candidacy, Lung Transplant, Impairment Rating

Notes

• Wear comfortable shoes and take your usual medicines before the test unless told otherwise.
• Tell the technician about joint pain or other problems that limit walking, so they are noted.
• Ask for copies of the results; repeat tests over time show change.