Participants
IBD, UC
Children, aged 6–8 years, with a diagnosis of IBD (CD, UC, or IBD-unclassified) confirmed by ileocolonoscopy and upper endoscopy with histology on multiple mucosal biopsies were eligible for enrollment. Exclusion criteria were: children with a physical inability to perform a cardiopulmonary exercise test (CPET), participation in organized exercise programs, and medical contra-indications for exercise.