The 6-Minute Walk Test (6MWT) is a simple, practical test used to assess functional exercise capacity in patients with chronic lung diseases, heart conditions, and other mobility-related issues. It measures the distance a person can walk on a flat surface in six minutes at their own pace while monitoring heart rate, oxygen saturation, and perceived exertion. The test helps evaluate disease progression, treatment effectiveness, and the need for rehabilitation. Commonly used in pulmonary and cardiac care, the 6MWT provides valuable insights into a patient’s endurance and overall health, guiding physicians in optimizing treatment plans and improving quality of life.