StandUPTV: Reducing Sedentary Screen Time in Adults

Not Applicable

Completed

• Conditions: Sedentary Behavior; Sleep; Physical Activity; Screen Time

• Registration Number: NCT04464993
• Lead Sponsor: Arizona State University

Brief 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.

Study Timeline

• Study First Submitted: 2020-07-03
• Study First Submitted QC: 2020-07-08
• Study First Posted: 2020-07-09
• Study Start: 2021-06-21
• Primary Completion: 2023-09-30
• Study Completion: 2023-09-30
• Results First Submitted: 2025-02-21
• Status Verified: 2025-03
• Results First Submitted QC: 2025-04-11
• Last Update Submitted: 2025-04-11
• Results First Posted: 2025-04-15
• Last Update Posted: 2025-04-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 110

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: FACTORIAL

Primary Outcome Measures

Name	Time	Method
Changes in Sedentary Screen Time	Baseline to 16 weeks	Minutes per day as measured by Stand UPTV app and activPAL

Secondary Outcome Measures

Name	Time	Method
Changes in Moderate to Vigorous Physical Activity	Baseline to16 weeks	Changes in moderate to vigorous physical activity (minutes per day as measured by activPAL)
Changes in Time Spent Sitting	Baseline to 16 weeks	Changes in time spent sitting (Minutes per day as measured by activPAL)
Changes in Time Spent Standing	Baseline and 16 weeks	Changes in minutes per day of standing time as measured by activPAL
Changes in Time Spent Stepping	Baseline to 16 weeks	Minutes per day as measured by activPAL

Trial Locations

Locations (2)

California Polytechnic University San Luis Obispo; 🇺🇸 San Luis Obispo, California, United States

Arizona State University; 🇺🇸 Tempe, Arizona, United States