Using Consumer-Grade Physical Activity Trackers to Measure Frailty Transitions in Older Critical Care Survivors: Exploratory Observational Study

Ben Kim   ¹ , PhD ;   Miranda Hunt   ² , BA ;   John Muscedere   ² , MD ;   David M Maslove   ² , MD, MS, FRCP ;   Joon Lee   ^{3, 4, 5} , PhD

¹ School of Public Health and Health Systems, University of Waterloo, Waterloo, ON, Canada

² Department of Critical Care Medicine, Queen's University, Kingston, ON, Canada

³ Data Intelligence for Health Lab, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada

⁴ Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada

⁵ Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada