Reduce Sedentary Behavior During Cancer Treatment - the RedSedCan Study

The program consists of commercially available technologies, e.g. applications including behavour change techniques for reducing sedentary behavior (SB) (i.e. self-monitorization of physical activity, reminders for breaking SB/doing physical activity, and providing feedback on physical activity/breaks from SB) and a webpage containing information and tips (provided in short videos and text) regarding how to reduce SB. The participants will be receive help with setting goals for reducing time spent in sedentary/being active and help with planning for what activities to do to replace time in sedentary. Participants will then have access to the webpage and download the application to their smartphones. Follow-up meetings with the physiotherapist (digital or physical) will be conducted after 2, 8 and 12 weeks after start of intervention.