Activity Intolerance [specify level] Taxonomy II: Activity/Rest—Class 4 Cardiovascular/Pulmonary Responses (00092) [Diagnostic Division: Activity/Rest] Submitted 1982 Definition: Insufficient physiological or psychological energy to endure or complete required or desired daily activities Related Factors Generalized weakness Sedentary lifestyle Bedrest or immobility Imbalance between oxygen supply and demand [Cognitive deficits/emotional status; secondary to underlying disease process/depression] [Pain, vertigo, extreme stress] Defining Characteristics SUBJECTIVE Report of fatigue or weakness Exertional discomfort or dyspnea [Verbalizes no desire and/or lack of interest in activity] OBJECTIVE Abnormal heart rate or blood pressure response to activity Electrocardiographic changes reflecting dysrhythmias or ischemia [pallor, cyanosis] Functional Level Classification (Gordon, 1987): Level I: Walk, regular pace, on level indefinitely; one flight or more but more short