StandUPTV: Reducing Sedentary Screen Time in Adults

StandUPTV: Reducing Sedentary Screen Time in Adults

The goal of this study is to develop an optimized intervention for reducing leisure sedentary screen time (SST) in middle-aged adults with overweight or obesity. Investigators will use the multiphase optimization (MOST) framework to conduct a highly efficient full-factorial experimental study to simultaneously test the main effects for each of three intervention components (LOCKOUT, TEXT, EARN) and their interactions (e.g., TEXT+EARN; LOCKOUT+EARN+TEXT) over 16 weeks.

Primary Aim: To identify which component(s) from three components under consideration for inclusion in StandUPTV reduce SST by >60 min per day per day at 16 weeks. The three components tested will be: (a) LOCKOUT (no vs. yes); (b) TEXT (no vs. yes); and (c) EARN (no vs. yes). The investigators will use a highly efficient experimental strategy to detect effects of individual components as well as all two- and three-way interactions.

The secondary aim of this study is to examine how reductions in SST displace time into other active behaviors, i.e., light-intensity physical activity (LPA), moderate-to vigorous physical activity (MVPA) and activity type (e.g., housework, walking, exercise behaviors). The investigators will use both device-based (activPAL3c) and self-report (ACT24) measures to understand whether SST displacement can increase active behaviors, particularly MVPA.

Inclusion Criteria:

• 23-64.90 years of age
• BMI≥25 kg/m2
• 3+ h/day of SST
• Insufficiently active
• Own an Apple or Android smartphone/tablet
• Access to internet at home or unlimited data plan
• Willing to download StandUPTV
• Able to read/understand English
• Willing to be randomized

Exclusion Criteria:

• Current smoker (more than once per week)
• Major life event (e.g., move out of study area, pregnant)
• MVPA contraindicated
• Occupation requires media use or high amounts of physical activity
• Drug abuse, major illness and/or psychological disorder