The 6-Minute Walk Test (6MWT) is a simple, non-invasive test used to assess a person’s functional exercise capacity and endurance. It measures the distance an individual can walk on a flat, hard surface in six minutes and is commonly used in patients with chronic respiratory diseases, heart failure, and other conditions affecting physical performance. The test reflects how well the heart, lungs, and muscles work together during physical activity. It helps monitor disease progression, evaluate response to treatment, and guide rehabilitation plans. The 6MWT is safe, cost-effective, and easy to perform, making it a valuable tool in both clinical and outpatient settings for assessing overall cardiopulmonary fitness.