Exclusion criteria
musculoskeletal injuries
DISEASE

A language barrier that prohibits the exercise instructors/supervisors to provide sufficient or safe instructions during the intervention or at the general health lessonA known heart condition that prevents patients from actively participating safely in the exercise interventionKnown pregnancy, planned pregnancy, or pregnancy during the intervention period because pregnancy needs extra precautions in the pharmacological treatment, and exercise with high intensity is not recommended limiting these patients to participate in the exercise interventionDisabling musculoskeletal injuries that limit patients from actively participating in the exercise interventionSevere disease activity manifested clinically and with the need for urgent change in medical or surgical treatment strategy evaluated by the responsible physicianThe responsible physician at the respective department of gastroenterology screens through the medical records for eligible patients. The screening information is not passed on to the research project, except for the personal identifier of patients and telephone number which are passed on to the research nurse. The eligible patients are approached at their upcoming appointment with information and the possibility to participate in the trial by the physician or research nurse. This is coordinated with the research nurse to ensure only eligible patients are approached at their forthcoming appointment. At each outpatient clinic, written information and posters will be used to inform patients of the trial and create awareness for the patients on the possibility to enter the trial.