title: Invited commentary.
authors.affiliation: Centre for Hip Health, Vancouver Coastal Health Research Institute, and Department of Physical Therapy, University of British Columbia, 357-2647 Willow St, Vancouver, British Columbia, Canada. teresa.ambrose@ubc.ca
authors.forename: Teresa Y
authors.initials: TY
authors.lastname: Liu-Ambrose
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D003072:Cognition Disorders / Q000503:physiopathology*; D015897:Comorbidity; D004185:Disability Evaluation; D056344:Executive Function / Q000502:physiology*; D005260:Female; D005684:Gait / Q000502:physiology*; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D051346:Mobility Limitation; D057185:Sedentary Behavior; D013997:Time Factors