StandUPTV: Reducing Sedentary Screen Time in Adults

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.

Conditions

• Sedentary Behavior
• Screen Time
• Physical Activity
• Sleep

Interventions

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.

Sponsors & Collaborators

• California Polytechnic State University-San Luis Obispo

  collaborator OTHER

• Arizona State University

  lead OTHER

Principal Investigators

• Matthew P Buman, PhD · Arizona State University

• Sarah Keadle, PhD · California Polytechnic University - San Luis Obispo

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

SINGLE

Model

FACTORIAL

Eligibility

Min Age

23 Years

Max Age

64 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2021-06-21

Primary Completion

2023-09-30

Completion

2023-09-30

Countries

• United States

Study Locations