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

Inclusion Criteria:

• Insufficiently active as defined by not meeting current US National Guidelines forPhysical 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 perhttps://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 iscontraindicated

• Diagnosed with diabetes or gestational diabetes in the past

• Currently using a CGM

• Pregnant

• Occupation that requires substantial use of personal device for media-relatedactivities (e.g., social media)

• Drug abuse

• Serious psychological disorder

• Not willing to use Fitbit or smart plugs for calculation of sedentary screen timefor functionality of StandUPTV app