%0 Journal Article %T Activity Levels in Healthy Older Adults: Implications for Joint Arthroplasty %A Laura E. Thorp %A Diego Orozco %A Joel A. Block %A Dale R. Sumner %J ISRN Orthopedics %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/727950 %U http://dx.doi.org/10.5402/2012/727950