Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Relationship between physical activity and stiff or painful joints in mid-aged women and older women: a 3-year prospective study. | Available online http content 9 2 R34 Research article Relationship between physical activity and stiff or painful joints in mid-aged women and older women a 3-year prospective study Kristiann C Heesch1 Yvette D Miller1 2 and Wendy J Brown1 Open Access School of Human Movement Studies The University of Queensland Blair Drive Brisbane Queensland 4072 Australia 2School of Psychology The University of Queensland Campbell Road Brisbane Queensland 4072 Australia Corresponding author Kristiann C Heesch kheesch@ Received 15 Aug 2006 Revisions requested 14 Sep 2006 Revisions received 14 Feb 2007 Accepted 29 Mar 2007 Published 29 Mar 2007 Arthritis Research Therapy 2007 9 R34 doi ar2154 This article is online at http content 9 2 R34 2007 Heesch et al. licensee BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract This prospective study examined the association between physical activity and the incidence of self-reported stiff or painful joints SPJ among mid-age women and older women over a 3year period. Data were collected from cohorts of mid-age 48 55 years at Time 1 n 4 780 and older women 72-79 years at Time 1 n 3 970 who completed mailed surveys 3 years apart for the Australian Longitudinal Study on Women s Health. Physical activity was measured with the Active Australia questions and categorized based on metabolic equivalent value minutes per week none 40 week very low 40 to 300 week low 300 to 600 week moderate 600 to 1 200 week and high 1 200 week . Cohort-specific logistic regression models were used to examine the association between physical activity at Time 1 and SPJ sometimes or often and separately often at Time 2. .