We will ask you to perform a six-minute walk test, or exercise oximetry, when your provider wants to assess your oxygenation levels with exercise. You will be asked to walk around for up to six minutes while a staff member keeps track of your oxygen levels. You can stop to rest or stop the test completely at any time if it is too difficult for you to complete a full six minutes. If your oxygen levels dip below a certain level, the staff member will place you on oxygen. This test is used to qualify patients for oxygen or to assess if a patient already on oxygen is at the correct level.