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.
Department of Physical Medicine and Rehabilitation, University of Michigan, 300 North Ingalls Street, Ann Arbor, MI 48109-2007, USA. sumurphy@umich.edu
