Study design
A single-centre RCT with two parallel groups with balanced randomisation (1:1) was performed (see CONSORT checklist in the supplementary material). Adult patients between 3 and 10 months after bariatric surgery were randomised to either the control group (CG) or intervention group (IG). While the CG received usual follow-up care alone, the IG additionally took part in a multimodal exercise programme for 3 months. After study completion, the CG received an individual exercise counselling, a free 10-pack subscription for a gym and all educational material used in the intervention as a compensation. Outcome assessments were performed pre intervention (t