PURPOSE AND HYPOTHESES Based on promising results from studies in type 2 diabetes, it is the primary purpose of this study to investigate interval-walking via InterWalk-app as health promoting exercise-intervention in patients with CRC. Specifically it is the aim of this pilot study to determine the safety, feasibility, adherence and compliance of InterWalk; as well as evaluating effects on cardio-metabolic health profile, compared to a waiting-list control group.