Association between performance fatigability and GPS‐measured community mobility

Community mobility has been defined as one's ability to access and interact with different areas within their larger spatial environment.1 Diminished community mobility has been associated with deleterious health outcomes including mortality.2 Understanding the associations between modifiable risk factors and community mobility may inform interventions to maintain independence in older adults. Fatigability can be operationalized as either perceived or performance related.3 Greater perceived fatigability (what one thinks they can do) has been associated with lower community mobility when using a validated self-reported life-space questionnaire.4, 5 We assessed whether performance fatigability (what one can do), the quantification of one's slowing down due to fatigue, was associated with Global Positioning System (GPS)-measured community mobility.