StandUPTV Habits: Feasibility Trial for Maintaining Reductions in Sedentary Screen Time

Inclusion Criteria: * Insufficiently active as defined by not meeting current US National Guidelines for Physical Activity of 150 minutes of MVPA/week (Measured by the Stanford * Leisure-Time Activity Categorical Item) * \> 3 hours of SST per day * Use Android (8.0+) smartphone (8.0+ represents 95% of Android device coverage per https://apilevels.com/) * Have regular broadband internet in their home or an unlimited data plan * Able to read/understand English (\>5th grade literacy) * Willing to download StandUPTV Habits * Willing to wear activPAL and CGM device during study assessment periods * Willing to have data shared in de-identified form in Dexcom Clarity platform * Willing to be randomized to either study condition * Not traveling overnight or longer in the next 4 months Exclusion Criteria: * Planned relocation * Current smoker * Have a major illness (e.g., heart disease, cancer, renal disease) for which MVPA is contraindicated * Diagnosed with diabetes or gestational diabetes in the past * Currently using a CGM * Pregnant * Occupation that requires substantial use of personal device for media-related activities (e.g., social media) * Drug abuse * Serious psychological disorder * Not willing to use Fitbit or smart plugs for calculation of sedentary screen time for functionality of StandUPTV app