1. Department of Kinesiology, Universit� de Montr�al, Montr�al, Qu�bec, H3C 3J7, Canada
2. Universit� de Montr�al Public Health Research Institute (IRSPUM), Montr�al, Qu�bec, H3C 3J7, Canada
3. Centre for Research and Expertise in Social Gerontology (CREG�S), Integrated Health and Social Services University Network for West-Central Montreal, C�te St-Luc, Qu�bec, H4W 2T5, Canada
4. Direction de Sant� Publique de la Mont�r�gie, CISSS Mont�r�gie-Centre, Longueuil, Qu�bec, J4K 2M3, Canada
5. Department of Social and Preventive Medicine, Universit� de Montr�al, Montr�al, Qu�bec, H3C 3J7, Canada
6. Direction R�gionale de Sant� Publique, CIUSSS du Centre-Sud-de-l'�le-de-Montr�al, Montr�al, Qu�bec, H2L 1M3, Canada
7. School of Rehabilitation, Faculty of Medicine, Universit� de Montr�al, Montr�al, Qu�bec, H3C 3J7, Canada
8. Centre de recherche de l’Institut universitaire de g�riatrie de Montr�al, 4545, Queen-Mary Road, Montr�al, Qu�bec, H3W 1W5, Canada