ATOMIC (Active Teens With MultIple sClerosis) Teens: A Feasibility Study

(a) PA Coach, One-on-one Chats. Coaches will conduct three one-on-one phone or video conferencing sessions and will also conduct a text messaging session once per week to reinforce and follow-up on the one-on-one phone sessions during the course of the intervention. (b) PA-Self Monitoring. An activity tracker (Fitbit Charge 2) will be used to allow participants to monitor their activity behaviors (e.g. step counts). (c) PA Information. In addition the coach will send weekly tailored PA informational posts/messages aligned with Social Cognitive Theory (SCT) to all participants. (d) Educational Modules. MS specific web-based interactive PA modules will be provided to patients.