Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleInvited commentary: physical activity over the life course--whose behavior changes, when, and why?AuthorsCorder K; Ogilvie D; van Sluijs EMPublicationAmerican Journal of Epidemiology, 2009, Vol 170, Issue 9, p1078ISSN0002-9262Publication typearticleDOI10.1093/aje/kwp273