Table 1.

Description of how intervention content is delivered in the SMART 2.0 Study

Content	Modalities	Description of delivery
Intention formation and goal setting	HC, text messages, online groups	- Health coach facilitates long- and short-term goal setting with the participants during each session. - Data collected by Fitbit and Aria scale prompt tailored weekly goals disseminated via text messages. - Health coach moderates online group discussion so that each group develops and works toward goals.
Self-monitoring	Fitbit activity tracker, connected scale, app, text messages, and social media	- Participants monitor PA, diet, sleep, and weight with on Fitbit devices and in app. - Ongoing self-monitoring is supported by prompts and reminders via text messages and social media.
Feedback	HC, Fitbit activity tracker, connected scale, app, text messages, and online groups	- Health coach provides feedback on participants’ progress on individual goals. - Feedback is provided in real time on Fitbit devices and in app. - Automated text messages containing a summary of individual progress toward reaching tailored weekly goals are sent along with a message of encouragement or positive reinforcement. - Participant posts about progress and/or challenges on social media and in online group and receives feedback from their social network, other participants, and health coach.
Goal review	HC and text messages	- During HC sessions, participants discuss goals and barriers and facilitators for achieving them. - Automated text messages are sent providing feedback on weekly goals and setting a new goal contingent on progress.
Social support and comparison of behavior	HC, text messages, social media, and online groups	- Health coach provides social support during sessions and suggests ways in which participants can seek out support. - Automated text messages include ways in which participants can leverage social support to reach goals. - Participants are connected to other participants and health coach via online groups that are structured to provide positive reinforcement and encouragement.
Restructuring the social environment	Social media, online groups	- Social media and online groups are used to encourage participants to plan PA- and diet-related behaviors together.
Restructuring the physical environment	Social media, online groups	- Information about where to exercise, eat well, and seek mental health resources on campus sent via social media and online groups.

HC health coaching, PA physical activity