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This article will review relevant mechanisms and markers associated with overtraining syndrome (OTS), and discuss signs and symptoms, differential diagnosis, and current assessment tools for fatigue within the context of overtraining. The findings are drawn from original research and review articles referenced by PubMed and ScienceDirect databases. Sources were selected for their contributions to...
The extreme conditions causing fatigue in military service members in combat and combat training deserve special consideration. The collective effects of severe exertion, limited caloric intake, and sleep deprivation, combined with the inherent stressors of combat, lead to both physiological and psychological fatigue that may significantly impair performance. Studies of combat training have revealed...
Cancer-related fatigue (CRF) is a disabling and distressing symptom that is highly prevalent across the cancer continuum from a patient's diagnosis and treatment through survivorship and end of life. It has a multifactorial etiology and significant individual variability in its clinical expression, determinants, and sequelae. Despite the significance of CRF, it is often underdiagnosed, and management...
Describe and define the concept of central fatigue, as well as discuss the behavioral and neuroimaging studies that attempt its assessment and measurement. A brief description of how fatigue can be differentiated from psychiatric symptoms and from sleepiness is also provided. Promising directions for future research will be outlined in the final portion of this review. Despite its popular clinical...
The shared goal of all clinical disciplines is to optimize the well-being of people who become patients and find themselves diminished by illness and recovery. This goal relies on sound tools to evaluate both real and perceived deficits in a way that can be used for a particular patient over time and also across medical disciplines and patient populations. Fatigue is a critical and notoriously subjective...
Biological and psychological bases for the covariation of pain and fatigue in fibromyalgia (FM) are reviewed. FM is characterized as a disorder of central sensitization, with pain and fatigue as the most prominent symptoms. The roles of sleep disturbance and affective dysregulation as both precipitants and consequences of pain and fatigue in FM are discussed. It is argued that a positive affective...
Aid in understanding issues surrounding the construct validity of fatigue including the distinction between pathological versus nonpathological fatigue. Fatigue is a universal symptom reported by individuals in the general population as well as by those suffering from different medical and psychological illnesses, including cancer, multiple sclerosis, chronic fatigue syndrome, depression, and anxiety...
Fatigue is a common symptom and includes both physical and mental components. It can be associated with a variety of different syndromes and diseases, but in many cases is not associated with other comorbid conditions. Most humans have experienced acute fatigue in relation to different stressors. Acute fatigue typically decreases as the effect of the triggering factor is reduced and a normal homeostatic...
Fatigue is a common side effect of medications. This review summarizes some of the mechanisms by which drugs may cause fatigue. One major mechanism by which medications can cause fatigue is by central nervous system (CNS) depression. CNS depression can result from decreased excitatory activity, as is commonly seen with some anticholinergic agents, centrally acting α-agonists, and anticonvulsants....
Central fatigue, a persistent and subjective sense of tiredness, generally correlates poorly with traditional markers of disease. It is frequently associated with psychosocial factors, such as depression, sleep disorder, anxiety, and coping style, which suggest that dysregulation of the body's stress systems may serve as an underlying mechanism in the maintenance of chronic fatigue (CF). This article...
Fatigue is believed to be a common complaint among older adults; however, multiple studies of self-reported fatigue across the lifespan have found this may not be the case. To explain this paradox, this article considers “fatigability”–a phenotype characterized by the relationship between an individual's perceived fatigue and the activity level with which the fatigue is associated. Fatigability may...
Fatigue is a frequent reason for seeking medical attention. Endocrine dysfunction is a common etiology of fatigue. In fact, thyroid function is usually one of the first explanations on the list of possible diagnoses. The symptoms associated with endocrinopathies are frequently “nonspecific,” and psychiatric disease or psychological disorders need to be differentiated. Often, this can be accomplished...
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