Objective tests for<unk>  normally involve performing some<unk> . Common tests include stair climbing, walking for six minutes, a shuttle-walk test, a cardiac stress test, and the cardiopulmonary<unk>  test (CPET). In the six-minute walk test, the goal is to see how far the person can walk, with approximately 600 meters being a reasonable outcome for an average person without<unk> . The CPET test measures<unk>  capacity and help determine whether the cause of<unk>  is due to heart disease or to other causes. People who experience significant fatigue before reaching the anaerobic threshold usually have a non-cardiac cause for<unk> . Additionally, testing for<unk> -induced asthma may be appropriate.
Exercise intolerance
Paroxysmal nocturnal dyspnoea
Heat intolerance
Alarm fatigue
Palpitations
Platypnea
Myxedema
Tachypnea