Objectives Musculoskeletal (MSK) pain is a commonly reported obesity related co-morbidity. Our Weight Management Service (WMS) is a national Tier 3 referral centre for the treatment of adults with severe obesity. As part of our service we deliver a 6 week weight management in-patient programme (WMIPP). This WMIPP involves a 1,100kcal liquid diet, functional rehabilitation and psychology interventions. This study evaluates the impact of the WMIPP on MSK pain and physical function.