<unk>  is a term used to describe a condition where the patient is unable to do physical<unk>  at the level that would be expected of someone in his or her general physical condition, or experiences unusually severe post-exercise pain, fatigue, or other negative effects.<unk>  is not a disease or syndrome in and of itself, but a symptom.
Exercise intolerance
Paroxysmal nocturnal dyspnea
Palpitation
Platypnea
Myxedema
Tachypnea
Orthopnea
Dyspnea