The journals of gerontology. Series A, Biological sciences and medical sciences
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J. Gerontol. A Biol. Sci. Med. Sci. · Feb 2010
Ecological measurement of fatigue and fatigability in older adults with osteoarthritis.
Fatigue is associated with loss of independence in older adults; however, little is known about optimal treatment or how fatigue manifests in daily life activities. "Fatigability" was recently proposed to clarify the fatigue-activity relationship. The purpose of this study was to present a new measurement method of fatigability and begin to test its validity. ⋯ Although fatigue among people with OA was more associated with subjective reports of physical function and symptoms, pairing fatigue reports with physical activity tapped objective factors that may be related to the biomechanical demands of daily life activities. Thus, fatigability measurement may help discern how symptoms relate to daily life function and help to refine treatment approaches in OA.