What is the primary outcome measured during the 6-minute walk test (6MWT)?

The primary outcome measured during the 6-minute walk test (6MWT) is the distance walked in six minutes, commonly referred to as the six-minute walk distance. This test is widely used to assess the functional exercise capacity of individuals, particularly in those with various health conditions such as pulmonary or cardiovascular diseases. The distance covered provides a quantifiable measure of a patient's endurance and overall physical fitness.

During the test, participants are encouraged to walk as far as possible in a flat and straight path for a duration of six minutes. The resulting distance serves as an important indicator of functional mobility and can help in evaluating the effectiveness of interventions or in monitoring disease progression.

While heart rate, oxygen saturation, and perceived exertion can be monitored as part of the test to gather additional information about the individual's response to exercise, they are not the primary focus or outcome of the 6MWT. The six-minute walk distance is the key measure that reflects an individual's physical capability and readiness for daily activities.