RT Book, Section A1 Goodman, Catherine A1 Helgeson, Kevin SR Print(0) ID 1133951532 T1 Chronic Fatigue Syndrome T2 Exercise Prescription for Medical Conditions: Handbook for Physical Therapists YR 2011 FD 2011 PB McGraw-Hill Education PP New York, NY SN 9780803617148 LK fadavispt.mhmedical.com/content.aspx?aid=1133951532 RD 2024/03/29 AB This condition is an unexplained, persistent fatigue that is not a result of exertion and that lasts for 6 months or longer. Clients typically have unexplained fatigue along with symptoms of diffuse pain with impaired memory or concentration. This condition can result from numerous biologic, behavioral, and psychological factors. The leading cause is hypothesized to be the presence of a chronic infection that induces changes to the immunologic and neuroendocrine functions and autonomic nervous system regulation.1