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| Name | Class |
|---|---|
| California Polytechnic State University-San Luis Obispo | OTHER |
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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| CORE | Experimental | Participants will receive a "core" intervention which will include a basic version of the StandUPTV app and a Fitbit watch to use throughout the 16-week intervention.The Fitbit will provide device-based behavioral feedback through the StandUPTV self-monitoring component. SST feedback will be Self-monitoring will provide passive and objective feedback regarding SST behaviors and MVPA drawn from Fitbit and SCREENTIME sources. 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. |
|
| CORE + text | Experimental | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. |
|
| CORE + Lockout | Experimental | CORE components + Lockout component 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 from the StandUPTV app 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 provided with a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Changes in Sedentary Screen Time | Minutes per day as measured by Stand UPTV app and activPAL | Baseline to 16 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Changes in Moderate to Vigorous Physical Activity | Changes in moderate to vigorous physical activity (minutes per day as measured by activPAL) | Baseline to16 weeks |
| Changes in Time Spent Sitting |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Matthew P Buman, PhD | Arizona State University | Principal Investigator |
| Sarah Keadle, PhD | California Polytechnic University - San Luis Obispo | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Arizona State University | Tempe | Arizona | 85281 | United States | ||
| California Polytechnic University San Luis Obispo |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 41622211 | Derived | Hasanaj K, Leonard KS, Sears DD, Yu F, Petrov ME, Keadle SK, Buman MP. Bidirectional associations of recreational sedentary screen time and 24-h behaviors: a dynamic cross-sectional multilevel model analysis. J Act Sedentary Sleep Behav. 2026 Feb 1;5(1):4. doi: 10.1186/s44167-026-00096-0. | |
| 40514642 | Derived | Keadle SK, Hasanaj K, Leonard KS, Fernandez A, Freid L, Weiss S, Legato M, Anand H, Hagobian TA, Phillips SM, Phelan S, Guastaferro K, Seltzer RGN, Buman MP. StandUPTV: a full-factorial optimization trial to reduce sedentary screen time among adults. Int J Behav Nutr Phys Act. 2025 Jun 13;22(1):77. doi: 10.1186/s12966-025-01771-2. |
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The participants were required to have ≥4 days of measured screen time (i.e., verification from the study server that tablet and WeMo data were transmitted > 10 h/day) during the baseline period and were asked to repeat the baseline test if they had < 4 days recorded.
Data collection was scheduled to begin in July 2020 but was delayed until June 21, 2021 because of COVID-19. Specifically, we removed planned cardiovascular biomarker assessment, and the protocol was modified to conduct all assessments virtually, which opened recruitment to those outside the Phoenix, AZ and San Luis Obispo areas but delayed the start of the study. Enrollment continued until April 2023, and data collection was completed in September 2023.
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| ID | Title | Description |
|---|---|---|
| FG000 | CORE | Participants will receive a "core" intervention which will include a basic version of the StandUPTV app and a Fitbit watch.The Fitbit will provide device-based behavioral feedback through the StandUPTV self-monitoring component. SST feedback will be Self-monitoring will provide passive and objective feedback regarding SST behaviors and MVPA drawn from Fitbit and SCREENTIME sources. 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. 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. |
| Title | Milestones | Reasons Not Completed | |||||
|---|---|---|---|---|---|---|---|
| Overall Study |
|
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot | Yes | No | No | Study Protocol | Apr 11, 2022 | Mar 12, 2025 |
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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.
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Outcomes assessor will not have access to study arm assignment and participants will be encouraged not to divulge their study arm assignment during assessments.
|
| CORE + Earn | Active Comparator | CORE components + 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 from the StandUPTV app 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 provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
|
| CORE + Text + Earn | Active Comparator | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
|
| CORE + Text + Lockout | Active Comparator | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
|
| CORE + Earn + Lockout | Active Comparator | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
|
| CORE + Earn + Lockout + Text | Active Comparator | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
|
|
| 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. |
|
Changes in time spent sitting (Minutes per day as measured by activPAL)
| Baseline to 16 weeks |
| Changes in Time Spent Standing | Changes in minutes per day of standing time as measured by activPAL | Baseline and 16 weeks |
| Changes in Time Spent Stepping | Minutes per day as measured by activPAL | Baseline to 16 weeks |
| San Luis Obispo |
| California |
| 93407 |
| United States |
| 40060037 | Derived | Keadle S, Hasanaj K, Leonard-Corzo KS, Fernandez A, Freid L, Weiss S, Legato M, Anand H, Hagobian T, Phillips S, Phelan S, Guastaferro K, Seltzer R, Buman M. StandUPTV: A full-factorial optimization trial to reduce sedentary screen time among adults. Res Sq [Preprint]. 2025 Feb 24:rs.3.rs-5984168. doi: 10.21203/rs.3.rs-5984168/v1. |
| FG001 | CORE + Text | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. 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. 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). |
| FG002 | CORE + Lockout | CORE components + Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the StandUPTV app will restrict screen time through the end of the week (Monday-Sunday). Participants will be provided with a planning tool for planning SST. 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. 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 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. |
| FG003 | CORE + Earn | CORE components + 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the investigators will use the limits from the StandUPTV app to restrict screen time through the end of the week (Monday-Sunday). Participants will be provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. Device-based feedback, self-monitoring, and education: CORE: Participants will receive a basic version of the StandUPTV app on an android tablet and a Fitbit to use throughout the 16-week intervention. 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. All participants will be provided a behavioral target of reducing their SST by 50% from their baseline. 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. |
| FG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| FG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| FG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| FG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
| COMPLETED |
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| NOT COMPLETED |
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| ID | Title | Description |
|---|---|---|
| BG000 | CORE | Participants will receive a "core" intervention which will include a basic version of the StandUPTV app and a Fitbit watch to use throughout the 16-week intervention.The Fitbit will provide device-based behavioral feedback through the StandUPTV self-monitoring component. SST feedback will be Self-monitoring will provide passive and objective feedback regarding SST behaviors and MVPA drawn from Fitbit and SCREENTIME sources. 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. |
| BG001 | CORE + Text | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. |
| BG002 | CORE + Lockout | CORE components + Lockout component 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 from the StandUPTV app 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 provided with a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| BG003 | CORE + Earn | CORE components + 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 from the StandUPTV app 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 provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| BG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| BG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| BG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| BG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
| BG008 | Total | Total of all reporting groups |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean | Standard Deviation | years |
| |||||||||||||||
| Sex: Female, Male | Count of Participants | Participants |
| ||||||||||||||||
| Ethnicity (NIH/OMB) | Count of Participants | Participants |
| ||||||||||||||||
| Race/Ethnicity, Customized | Count of Participants | Participants |
|
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Changes in Sedentary Screen Time | Minutes per day as measured by Stand UPTV app and activPAL | Analyzed sample with multiple imputation. | Posted | Mean | 95% Confidence Interval | minutes per day | Baseline to 16 weeks |
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| ||||||||||||||||||||||||||||||||||||||||||||||
| Secondary | Changes in Moderate to Vigorous Physical Activity | Changes in moderate to vigorous physical activity (minutes per day as measured by activPAL) | Analyzed sample with multiple imputation. | Posted | Mean | 95% Confidence Interval | minutes per day | Baseline to16 weeks |
| ||||||||||||||||||||||||||||||||||||||||||||||||
| Secondary | Changes in Time Spent Sitting | Changes in time spent sitting (Minutes per day as measured by activPAL) | Analyzed sample with multiple imputation. | Posted | Mean | 95% Confidence Interval | minutes per day | Baseline to 16 weeks |
| ||||||||||||||||||||||||||||||||||||||||||||||||
| Secondary | Changes in Time Spent Standing | Changes in minutes per day of standing time as measured by activPAL | Analyzed sample with imputation | Posted | Mean | 95% Confidence Interval | minutes per day | Baseline and 16 weeks |
| ||||||||||||||||||||||||||||||||||||||||||||||||
| Secondary | Changes in Time Spent Stepping | Minutes per day as measured by activPAL | Analyzed sample with imputation | Posted | Mean | 95% Confidence Interval | minutes per day | Baseline to 16 weeks |
|
Baseline to 16 weeks (end of intervention period).
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | CORE | Participants will receive a "core" intervention which will include a basic version of the StandUPTV app and a Fitbit watch.The Fitbit will provide device-based behavioral feedback through the StandUPTV self-monitoring component. SST feedback will be Self-monitoring will provide passive and objective feedback regarding SST behaviors and MVPA drawn from Fitbit and SCREENTIME sources. 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. 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. | 0 | 11 | 0 | 11 | 0 | 11 |
| EG001 | CORE + Text | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. 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. 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). | 0 | 13 | 0 | 13 | 0 | 13 |
| EG002 | CORE + Lockout | CORE components + Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the StandUPTV app will restrict screen time through the end of the week (Monday-Sunday). Participants will be provided with a planning tool for planning SST. 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. 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 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. | 0 | 14 | 0 | 14 | 0 | 14 |
| EG003 | CORE + Earn | CORE components + 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the investigators will use the limits from the StandUPTV app to restrict screen time through the end of the week (Monday-Sunday). Participants will be provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. Device-based feedback, self-monitoring, and education: CORE: Participants will receive a basic version of the StandUPTV app on an android tablet and a Fitbit to use throughout the 16-week intervention. 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. All participants will be provided a behavioral target of reducing their SST by 50% from their baseline. 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. | 0 | 16 | 0 | 16 | 0 | 16 |
| EG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. | 0 | 15 | 0 | 15 | 0 | 15 |
| EG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). | 0 | 15 | 0 | 15 | 0 | 15 |
| EG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. | 0 | 10 | 0 | 10 | 0 | 10 |
| EG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). | 0 | 16 | 0 | 16 | 0 | 16 |
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Owing to delays in initiating and slowing recruitment during the COVID-19 pandemic, we did not meet the enrollment targets. Trial concluded when funding ended.
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Matthew P Buman, PhD, Director & Professor | Arizona State University | 602-496-8617 | mbuman@asu.edu |
| Prot_000.pdf |
| SAP | No | Yes | No | Statistical Analysis Plan | Apr 11, 2022 | Apr 3, 2025 | SAP_001.pdf |
| ICF | No | No | Yes | Informed Consent Form | Mar 25, 2022 | Feb 17, 2025 | ICF_002.pdf |
| ID | Term |
|---|---|
| D057185 | Sedentary Behavior |
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001519 | Behavior |
Not provided
Not provided
| Male |
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| Not Hispanic or Latino |
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| Unknown or Not Reported |
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| Black |
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| Asian |
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| Other |
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| Unknown |
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| OG001 | CORE + Text | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. 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. 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). |
| OG002 | CORE + Lockout | CORE components + Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the StandUPTV app will restrict screen time through the end of the week (Monday-Sunday). Participants will be provided with a planning tool for planning SST. 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. 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 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. |
| OG003 | CORE + Earn | CORE components + 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the investigators will use the limits from the StandUPTV app to restrict screen time through the end of the week (Monday-Sunday). Participants will be provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. Device-based feedback, self-monitoring, and education: CORE: Participants will receive a basic version of the StandUPTV app on an android tablet and a Fitbit to use throughout the 16-week intervention. 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. All participants will be provided a behavioral target of reducing their SST by 50% from their baseline. 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. |
| OG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| OG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| OG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| OG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
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| OG001 | CORE + Text | CORE components + The TEXT component uses app-based prompts (i.e., prompts generated through StandUPTV app) that will provide simple adaptive content based upon length of most recent SST bout and time of day. These prompts will specifically target outcome expectations around SST and MVPA. 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. 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). |
| OG002 | CORE + Lockout | CORE components + Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the StandUPTV app will restrict screen time through the end of the week (Monday-Sunday). Participants will be provided with a planning tool for planning SST. 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. 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 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. |
| OG003 | CORE + Earn | CORE components + 50% per week reduction in SST, based upon a baseline week. If SST reaches the prescribed threshold, the investigators will use the limits from the StandUPTV app to restrict screen time through the end of the week (Monday-Sunday). Participants will be provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. Device-based feedback, self-monitoring, and education: CORE: Participants will receive a basic version of the StandUPTV app on an android tablet and a Fitbit to use throughout the 16-week intervention. 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. All participants will be provided a behavioral target of reducing their SST by 50% from their baseline. 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. |
| OG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| OG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| OG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| OG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
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| CORE + Lockout |
CORE components + Lockout component 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 from the StandUPTV app 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 provided with a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| OG003 | CORE + Earn | CORE components + 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 from the StandUPTV app 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 provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| OG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| OG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| OG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| OG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
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| CORE + Lockout |
CORE components + Lockout component 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 from the StandUPTV app 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 provided with a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| OG003 | CORE + Earn | CORE components + 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 from the StandUPTV app 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 provided a planning tool for planning SST on a daily basis in order to reach their over 50% reduction goal. |
| OG004 | CORE + Text + Earn | Intervention components will be delivered as described in simpler factorial conditions. App shows progress toward SST goal or if goal is exceeded. Can earn additional SST through exercise based on 3:1 ratio , simple adaptive content (by SST bout, time of day). Lockout component will enforce a 50% per week reduction in SST, based upon a baseline week of observation. |
| OG005 | CORE + Text + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Simple adaptive content (by SST bout, time of day). |
| OG006 | CORE + Earn + Lockout | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio. |
| OG007 | CORE + Earn + Lockout + Text | Intervention components will be delivered as described in simpler factorial conditions, and... If exceeded, the limits feature will restrict screen time through the end of the week (Monday-Sunday) so cannot exceed limit. Can earn additional SST through exercise based on 3:1 ratio). Simple adaptive content (by SST bout, time of day). |
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