http://arthritis-research.com/content/7/6/R1263/comments The latest comments on the article 'Aerobic exercise and its impact on musculoskeletal pain in older adults: a 14 year prospective, longitudinal study' 2005-09-28T22:44:35Z http://arthritis-research.com/content/7/6/R1263/comments#212488 <p>Although Bruce, Fries and Lubeck's article provides validation of the benefits of exercise in the ageing process, there could be some selection biases in the sampling. Had the authors considered that it could be that persons who join a running club would be less likely to have pain in the first place; be more fit and interested in activity to begin with? Maybe there could be a way to randomise the running as an intervention, instead of using 'self selection'. My clinical education and research experience has prompted me to ask this question.</p> Susan DeVries 2005-09-28T22:44:35Z http://arthritis-research.com/content/7/6/R1263 Bruce et al. Arthritis Research & Therapy 7 R1263 Mon Sep 19 00:00:00 BST 2005