TY - JOUR T1 - Knee arthroplasty: a window of opportunity to improve physical activity in daily life, sports and work JF - BMJ Open Sport & Exercise Medicine JO - BMJ OPEN SP EX MED DO - 10.1136/bmjsem-2020-000822 VL - 6 IS - 1 SP - e000822 AU - Pieter Coenen AU - Carlien Straat AU - P Paul Kuijer Y1 - 2020/06/01 UR - http://bmjopensem.bmj.com/content/6/1/e000822.abstract N2 - Unicompartmental and total knee arthroplasty are well established treatment options, primarily aimed at reducing pain and improving joint function for patients with end-stage knee osteoarthritis.1 Although most patients receiving knee arthroplasty have good clinical outcomes, core outcome definitions suggest that societal participation after surgery is not a primary treatment goal.2 This is unfortunate as the number of patients receiving arthroplasty is rapidly increasing. In the Netherlands, a 297% growth in knee arthroplasties is expected between 2005 and 2030,3 with half of the patients of working age due the rising pension age and increasing trends in osteoarthritis among younger people. In particular for these ‘younger’ patients, societal participation including activities of daily life, sport and work is essential.4In BMJ Open Sport & Exercise Medicine, Konings and colleagues5 reported on a systematic review on 19 studies (n=4074 participants) on physical activity and sports participation before and after knee arthroplasty. The authors found that knee arthroplasty, in general, has positive effects on physical activity and sports participation. Physical activity and sports participation return to levels similar to those before the osteoarthritis symptoms and is fortunately much higher compared with presurgery. Only high-impact sports were less frequently resumed after surgery. Furthermore, patients who remained active until the surgery were also most active after surgery, while patients who stopped participating in physical activities and sports prior to surgery were less likely to restart postsurgery.Physical activity is … ER -