Study: NCT03911141

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Gamification
Description: Participants have an 8-week ramp-up period where daily goals increase from baseline to the step target, and sign a pledge agreeing to try their best to meet their goals.~Participants are entered into a game. Each week they receive 70 points. Each day they're told their step count and points. If the step goal was met they keep their points, but if not, they lose 10 points. At the end of the week if they have at least 40 points they move up a level, but if not, they drop a level. Participants start in the middle of 5 levels.~Participants choose a support partner who gets a weekly email with the participant's progress. We hold a 3-way phone call with the participant and supportive sponsor to discuss ways they can help the participant meet their goal. Every 8 weeks, have a follow up call if the participant is stuck in a lower level and restart them back at the middle level.~In the follow-up period, participants continue to get a daily text stating if they met their step goal.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Gamification
Description: Participants have an 8-week ramp-up period where daily goals increase from baseline to the step target, and sign a pledge agreeing to try their best to meet their goals.~Participants are entered into a game. Each week they receive 70 points. Each day they're told their step count and points. If the step goal was met they keep their points, but if not, they lose 10 points. At the end of the week if they have at least 40 points they move up a level, but if not, they drop a level. Participants start in the middle of 5 levels.~Participants choose a support partner who gets a weekly email with the participant's progress. We hold a 3-way phone call with the participant and supportive sponsor to discuss ways they can help the participant meet their goal. Every 8 weeks, have a follow up call if the participant is stuck in a lower level and restart them back at the middle level.~In the follow-up period, participants continue to get a daily text stating if they met their step goal.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Financial
Description: Participants are informed that each week money is placed in a virtual account for them. Each day the participant is informed of their step count on the prior day. If the step goal was achieved, the balance remains. Each day the goal is not achieved, the participant is informed that some of the money was taken away. We will use an 8-week ramp-up period in which daily goals are increased gradually from baseline to targets.~During the follow-up period, participants in this arm will continue to receive a daily text message stating whether or not they achieved their step goal on the prior day.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Financial
Description: Participants are informed that each week money is placed in a virtual account for them. Each day the participant is informed of their step count on the prior day. If the step goal was achieved, the balance remains. Each day the goal is not achieved, the participant is informed that some of the money was taken away. We will use an 8-week ramp-up period in which daily goals are increased gradually from baseline to targets.~During the follow-up period, participants in this arm will continue to receive a daily text message stating whether or not they achieved their step goal on the prior day.