Validity of the Fitbit activity tracker for measuring steps in community-dwelling older adults
Serene S Paul, Anne Tiedemann, Leanne M Hassett, Elisabeth Ramsay, Catherine Kirkham, Sakina Chagpar, Catherine Sherrington
BMJ Open Sport & Exercise Medicine Jul 2015, 1 (1) e000013; DOI: 10.1136/bmjsem-2015-000013