NCT04464993

StandUPTV: Reducing Sedentary Screen Time in Adults

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 110 (actual)
• Sponsor: Arizona State University · Academic / Other
• Sex: All
• Age: 23 Years – 64 Years
• Healthy volunteers: Accepted

Summary

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.

Detailed description

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.

Conditions

• Sedentary Behavior
• Screen Time
• Physical Activity
• Sleep

Interventions

Type	Name	Description
BEHAVIORAL	Device-based feedback, self-monitoring, and education: CORE	Participants will receive a "core" intervention which will include a basic version of the StandUPTV app on an android tablet and a Fitbit to use throughout the 16-week intervention.t. SST feedback will be provided within the smartphone application. Self-monitoring will provide passive and objective feedback regarding SST behaviors. StandUPTV will also contain basic education including information on the risks of SST and tips for reducing SST. As part of this education, all participants will be provided a behavioral target of reducing their SST by 50% from their baseline. This target will be customized for the participant within StandUPTV based on a baseline week of observation.
BEHAVIORAL	Sedentary Screen Time lockout: LOCKOUT	Sedentary Screen Time lockout: LOCKOUT Sedentary Screen Time lockout: LOCKOUT The investigators will enforce a 50% per week reduction in SST, based upon a baseline week of observation. If SST reaches the prescribed threshold, the investigators will use the limits feature to restrict screen time through the end of the week (Monday-Sunday); at which point, 50% baseline allotment will be reinstated for an additional week. Participants will be prompted to plan for their screen time and provided modest allowances for exceeding their screen time in a given week.
BEHAVIORAL	Context-based prompts: TEXT	The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV, not text message based) that will provide simple adaptive content. Content of the prompts will be educational (i.e., based on risks of sedentary screen time) and motivational (i.e., advice to reduce sedentary screen time).
BEHAVIORAL	Earn sedentary screen time through moderate-vigorous physical activity: EARN	Earn sedentary screen time through moderate-vigorous physical activity: EARN Participants assigned to the EARN component will earn SST by engaging in a \>5 min continuous bout of exercise (as defined by Fitbit minutes \>4 metabolic equivalents). They will earn SST on a 3:1 ratio up until they reach their baseline level of MVPA (5 mins of exercise earns 15 mins of SST). They will receive behavioral strategies to reduce screen time within the app (e.g., self-efficacy, barriers, exercising safely) and a planning tool for scheduling MVPA.

Timeline

• Start date: 2021-06-21
• Primary completion: 2023-09-30
• Completion: 2023-09-30
• First posted: 2020-07-09
• Last updated: 2025-04-15
• Results posted: 2025-04-15

Locations

2 sites across 1 country: United States