Persons with MS were consulted in the first and second phases of this project as part of the development and preliminary testing of the intervention. We interviewed 15 persons with MS to increase our understanding of their perspectives on sedentary behaviour and how it could be changed.28 Persons with MS also participated in preliminary testing and modification of the intervention and study procedures, prior to the feasibility trial. These processes are described at the end of the Study Design section. Formative information about activity from the ActivPAL3 and the Fitbit are shared and discussed with participants throughout the trial to increase their under- standing of current activity behaviour. Throughout the trial, participants are being asked if they would like to receive publications related to the results of the study. Those who have requested that information will receive publications directly by email. Results will also be shared through social media, and through the MS Society of Alberta.