Skip to main content
OpenTrials
Completed

NCT Number: NCT04464993

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.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Sedentary Behavior Behavior Motor Activity Physical Activity Screen Time Sleep

Age range

23 year–64 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Arizona State University, Tempe, Arizona, United States

Loading trial locations.

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Device-based feedback, self-monitoring, and education: CORE

Behavioral

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.

Sedentary Screen Time lockout: LOCKOUT

Behavioral

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.

Context-based prompts: TEXT

Behavioral

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).

Earn sedentary screen time through moderate-vigorous physical activity: EARN

Behavioral

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.

Primary outcomes

  1. Changes in Sedentary Screen Time

    Time frame: Baseline to 16 weeks

    Minutes per day as measured by Stand UPTV app and activPAL

Secondary outcomes

  1. Changes in Moderate to Vigorous Physical Activity

    Time frame: Baseline to16 weeks

    Changes in moderate to vigorous physical activity (minutes per day as measured by activPAL)

  2. Changes in Time Spent Sitting

    Time frame: Baseline to 16 weeks

    Changes in time spent sitting (Minutes per day as measured by activPAL)

  3. Changes in Time Spent Standing

    Time frame: Baseline and 16 weeks

    Changes in minutes per day of standing time as measured by activPAL

  4. Changes in Time Spent Stepping

    Time frame: Baseline to 16 weeks

    Minutes per day as measured by activPAL

Sponsors and collaborators

Lead sponsor

Arizona State University

Other

Collaborators

  • California Polytechnic State University-San Luis Obispo

Registry information

Acronym: StandUPTV

Important dates

Study start
2021
Primary completion
2023
Study completion
2023
First posted
Jul 9, 2020
Registry last updated
Apr 15, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.