Study: NCT05375162

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Core Intervention
Description: All participants will receive a low-resource self-monitoring intervention consisting of the Fitbit Alta HR (or similar) and the Opt2Move self-monitoring app.~Participants will be provided with the Fitbit Alta HR. They will be asked to download the Fitbit app and wear the Fitbit 24/7 throughout the 24-week study period. The Fitbit measures PA intensity, steps, and heart rate, and it syncs directly with the Ftibit app on the smartphone which will ill automatically sync with the Opt2Move study app and provide Fitbit data to the study team in real-time.~The core Opt2Move study app will support YACS to increase their MVPA. The app will also contain educational information on MVPA and effective behavior change strategies for building self-efficacy, overcoming barriers, enhancing facilitators, setting realistic outcome expectations, and self-regulatory skill-building (i.e., reviewing progress, goal setting, action-planning and coping with disruptions).

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Core Intervention
Description: All participants will receive a low-resource self-monitoring intervention consisting of the Fitbit Alta HR (or similar) and the Opt2Move self-monitoring app.~Participants will be provided with the Fitbit Alta HR. They will be asked to download the Fitbit app and wear the Fitbit 24/7 throughout the 24-week study period. The Fitbit measures PA intensity, steps, and heart rate, and it syncs directly with the Ftibit app on the smartphone which will ill automatically sync with the Opt2Move study app and provide Fitbit data to the study team in real-time.~The core Opt2Move study app will support YACS to increase their MVPA. The app will also contain educational information on MVPA and effective behavior change strategies for building self-efficacy, overcoming barriers, enhancing facilitators, setting realistic outcome expectations, and self-regulatory skill-building (i.e., reviewing progress, goal setting, action-planning and coping with disruptions).

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Core Intervention
Description: All participants will receive a low-resource self-monitoring intervention consisting of the Fitbit Alta HR (or similar) and the Opt2Move self-monitoring app.~Participants will be provided with the Fitbit Alta HR. They will be asked to download the Fitbit app and wear the Fitbit 24/7 throughout the 24-week study period. The Fitbit measures PA intensity, steps, and heart rate, and it syncs directly with the Ftibit app on the smartphone which will ill automatically sync with the Opt2Move study app and provide Fitbit data to the study team in real-time.~The core Opt2Move study app will support YACS to increase their MVPA. The app will also contain educational information on MVPA and effective behavior change strategies for building self-efficacy, overcoming barriers, enhancing facilitators, setting realistic outcome expectations, and self-regulatory skill-building (i.e., reviewing progress, goal setting, action-planning and coping with disruptions).

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Core Intervention
Description: All participants will receive a low-resource self-monitoring intervention consisting of the Fitbit Alta HR (or similar) and the Opt2Move self-monitoring app.~Participants will be provided with the Fitbit Alta HR. They will be asked to download the Fitbit app and wear the Fitbit 24/7 throughout the 24-week study period. The Fitbit measures PA intensity, steps, and heart rate, and it syncs directly with the Ftibit app on the smartphone which will ill automatically sync with the Opt2Move study app and provide Fitbit data to the study team in real-time.~The core Opt2Move study app will support YACS to increase their MVPA. The app will also contain educational information on MVPA and effective behavior change strategies for building self-efficacy, overcoming barriers, enhancing facilitators, setting realistic outcome expectations, and self-regulatory skill-building (i.e., reviewing progress, goal setting, action-planning and coping with disruptions).