<clinical_study>
  <!-- This xml conforms to an XML Schema at:
    https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
  <required_header>
    <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
    <link_text>Link to the current ClinicalTrials.gov record.</link_text>
    <url>https://clinicaltrials.gov/ct2/show/NCT04464993</url>
  </required_header>
  <id_info>
    <org_study_id>R01CA239612</org_study_id>
    <nct_id>NCT04464993</nct_id>
  </id_info>
  <brief_title>StandUPTV: Reducing Sedentary Screen Time in Adults</brief_title>
  <acronym>StandUPTV</acronym>
  <official_title>StandUPTV: Reducing Sedentary Screen Time in Adults</official_title>
  <sponsors>
    <lead_sponsor>
      <agency>Arizona State University</agency>
      <agency_class>Other</agency_class>
    </lead_sponsor>
    <collaborator>
      <agency>California Polytechnic State University-San Luis Obispo</agency>
      <agency_class>Other</agency_class>
    </collaborator>
  </sponsors>
  <source>Arizona State University</source>
  <oversight_info>
    <has_dmc>Yes</has_dmc>
    <is_fda_regulated_drug>No</is_fda_regulated_drug>
    <is_fda_regulated_device>No</is_fda_regulated_device>
  </oversight_info>
  <brief_summary>
    <textblock>
      The goal of this study is to develop an optimized intervention for reducing leisure sedentary&#xD;
      screen time (SST) in middle-aged adults with overweight or obesity. Investigators will use&#xD;
      the multiphase optimization (MOST) framework to conduct a highly efficient full-factorial&#xD;
      experimental study to simultaneously test the main effects for each of three intervention&#xD;
      components (LOCKOUT, TEXT, EARN) and their interactions (e.g., TEXT+EARN; LOCKOUT+EARN+TEXT)&#xD;
      over 16 weeks.&#xD;
    </textblock>
  </brief_summary>
  <detailed_description>
    <textblock>
      Primary Aim: To identify which component(s) from three components under consideration for&#xD;
      inclusion in StandUPTV reduce SST by &gt;60 min per day per day at 16 weeks. The three&#xD;
      components tested will be: (a) LOCKOUT (no vs. yes); (b) TEXT (no vs. yes); and (c) EARN (no&#xD;
      vs. yes). The investigators will use a highly efficient experimental strategy to detect&#xD;
      effects of individual components as well as all two- and three-way interactions.&#xD;
&#xD;
      The secondary aim of this study is to examine how reductions in SST displace time into other&#xD;
      active behaviors, i.e., light-intensity physical activity (LPA), moderate-to vigorous&#xD;
      physical activity (MVPA) and activity type (e.g., housework, walking, exercise behaviors).&#xD;
      The investigators will use both device-based (activPAL3c) and self-report (ACT24) measures to&#xD;
      understand whether SST displacement can increase active behaviors, particularly MVPA.&#xD;
    </textblock>
  </detailed_description>
  <overall_status>Active, not recruiting</overall_status>
  <start_date type="Actual">June 21, 2021</start_date>
  <completion_date type="Anticipated">August 31, 2023</completion_date>
  <primary_completion_date type="Anticipated">August 31, 2023</primary_completion_date>
  <phase>N/A</phase>
  <study_type>Interventional</study_type>
  <has_expanded_access>No</has_expanded_access>
  <study_design_info>
    <allocation>Randomized</allocation>
    <intervention_model>Factorial Assignment</intervention_model>
    <intervention_model_description>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.</intervention_model_description>
    <primary_purpose>Prevention</primary_purpose>
    <masking>Single (Outcomes Assessor)</masking>
    <masking_description>Outcomes assessor will not have access to study arm assignment and participants will be encouraged not to divulge their study arm assignment during assessments.</masking_description>
  </study_design_info>
  <primary_outcome>
    <measure>Changes in Sedentary Screen Time</measure>
    <time_frame>Baseline to 16 weeks</time_frame>
    <description>Minutes per week as measured by Stand UPTV app and activPAL</description>
  </primary_outcome>
  <secondary_outcome>
    <measure>Changes in moderate to vigorous physical activity</measure>
    <time_frame>Baseline, 8 weeks, 16 weeks</time_frame>
    <description>Minutes per week as measured by activPAL</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Changes in time spent sitting</measure>
    <time_frame>Baseline, 8 weeks, 16 weeks</time_frame>
    <description>Minutes per day as measured by activPAL</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Changes in time spent standing</measure>
    <time_frame>Baseline, 8 weeks, 16 weeks</time_frame>
    <description>Minutes per day as measured by activPAL</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Changes in time spent stepping</measure>
    <time_frame>Baseline, 8 weeks, 16 weeks</time_frame>
    <description>Minutes per day as measured by activPAL</description>
  </secondary_outcome>
  <number_of_arms>8</number_of_arms>
  <enrollment type="Anticipated">240</enrollment>
  <condition>Sedentary Behavior</condition>
  <condition>Screen Time</condition>
  <condition>Physical Activity</condition>
  <condition>Sleep</condition>
  <arm_group>
    <arm_group_label>CORE</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>Participants will receive a &quot;core&quot; 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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + text</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Lockout</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Earn</arm_group_label>
    <arm_group_type>Active Comparator</arm_group_type>
    <description>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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Text + Earn</arm_group_label>
    <arm_group_type>Active Comparator</arm_group_type>
    <description>Intervention components will be delivered as described in simpler factorial conditions.&#xD;
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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Text + Lockout</arm_group_label>
    <arm_group_type>Active Comparator</arm_group_type>
    <description>Intervention components will be delivered as described in simpler factorial conditions, and...&#xD;
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).</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Earn + Lockout</arm_group_label>
    <arm_group_type>Active Comparator</arm_group_type>
    <description>Intervention components will be delivered as described in simpler factorial conditions, and...&#xD;
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.</description>
  </arm_group>
  <arm_group>
    <arm_group_label>CORE + Earn + Lockout + Text</arm_group_label>
    <arm_group_type>Active Comparator</arm_group_type>
    <description>Intervention components will be delivered as described in simpler factorial conditions, and...&#xD;
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).</description>
  </arm_group>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Device-based feedback, self-monitoring, and education: CORE</intervention_name>
    <description>Participants will receive a &quot;core&quot; 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.</description>
    <arm_group_label>CORE</arm_group_label>
    <arm_group_label>CORE + Earn</arm_group_label>
    <arm_group_label>CORE + Earn + Lockout</arm_group_label>
    <arm_group_label>CORE + Earn + Lockout + Text</arm_group_label>
    <arm_group_label>CORE + Lockout</arm_group_label>
    <arm_group_label>CORE + Text + Earn</arm_group_label>
    <arm_group_label>CORE + Text + Lockout</arm_group_label>
    <arm_group_label>CORE + text</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Sedentary Screen Time lockout: LOCKOUT</intervention_name>
    <description>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.</description>
    <arm_group_label>CORE + Earn + Lockout</arm_group_label>
    <arm_group_label>CORE + Earn + Lockout + Text</arm_group_label>
    <arm_group_label>CORE + Lockout</arm_group_label>
    <arm_group_label>CORE + Text + Lockout</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Context-based prompts: TEXT</intervention_name>
    <description>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).</description>
    <arm_group_label>CORE + Earn + Lockout + Text</arm_group_label>
    <arm_group_label>CORE + Text + Earn</arm_group_label>
    <arm_group_label>CORE + Text + Lockout</arm_group_label>
    <arm_group_label>CORE + text</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Earn sedentary screen time through moderate-vigorous physical activity: EARN</intervention_name>
    <description>Earn sedentary screen time through moderate-vigorous physical activity: EARN Participants assigned to the EARN component will earn SST by engaging in a &gt;5 min continuous bout of exercise (as defined by Fitbit minutes &gt;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.</description>
    <arm_group_label>CORE + Earn</arm_group_label>
    <arm_group_label>CORE + Earn + Lockout</arm_group_label>
    <arm_group_label>CORE + Earn + Lockout + Text</arm_group_label>
    <arm_group_label>CORE + Text + Earn</arm_group_label>
  </intervention>
  <eligibility>
    <criteria>
      <textblock>
        Inclusion Criteria:&#xD;
&#xD;
          -  23-64.90 years of age&#xD;
&#xD;
          -  BMI≥25 kg/m2&#xD;
&#xD;
          -  3+ h/day of SST&#xD;
&#xD;
          -  Insufficiently active&#xD;
&#xD;
          -  Own an Apple or Android smartphone/tablet&#xD;
&#xD;
          -  Access to internet at home or unlimited data plan&#xD;
&#xD;
          -  Willing to download StandUPTV&#xD;
&#xD;
          -  Able to read/understand English&#xD;
&#xD;
          -  Willing to be randomized&#xD;
&#xD;
        Exclusion Criteria:&#xD;
&#xD;
          -  Current smoker (more than once per week)&#xD;
&#xD;
          -  Major life event (e.g., move out of study area, pregnant)&#xD;
&#xD;
          -  MVPA contraindicated&#xD;
&#xD;
          -  Occupation requires media use or high amounts of physical activity&#xD;
&#xD;
          -  Drug abuse, major illness and/or psychological disorder&#xD;
      </textblock>
    </criteria>
    <gender>All</gender>
    <minimum_age>23 Years</minimum_age>
    <maximum_age>64 Years</maximum_age>
    <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
  </eligibility>
  <overall_official>
    <last_name>Matthew P Buman, PhD</last_name>
    <role>Principal Investigator</role>
    <affiliation>Arizona State University</affiliation>
  </overall_official>
  <overall_official>
    <last_name>Sarah Keadle, PhD</last_name>
    <role>Principal Investigator</role>
    <affiliation>California Polytechnic University - San Luis Obispo</affiliation>
  </overall_official>
  <location>
    <facility>
      <name>Arizona State University</name>
      <address>
        <city>Tempe</city>
        <state>Arizona</state>
        <zip>85281</zip>
        <country>United States</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>California Polytechnic University San Luis Obispo</name>
      <address>
        <city>San Luis Obispo</city>
        <state>California</state>
        <zip>93407</zip>
        <country>United States</country>
      </address>
    </facility>
  </location>
  <location_countries>
    <country>United States</country>
  </location_countries>
  <verification_date>August 2023</verification_date>
  <study_first_submitted>July 3, 2020</study_first_submitted>
  <study_first_submitted_qc>July 8, 2020</study_first_submitted_qc>
  <study_first_posted type="Actual">July 9, 2020</study_first_posted>
  <last_update_submitted>August 23, 2023</last_update_submitted>
  <last_update_submitted_qc>August 23, 2023</last_update_submitted_qc>
  <last_update_posted type="Actual">August 24, 2023</last_update_posted>
  <responsible_party>
    <responsible_party_type>Sponsor</responsible_party_type>
  </responsible_party>
  <keyword>Multiphase optimization strategy</keyword>
  <keyword>Mobile health</keyword>
  <patient_data>
    <sharing_ipd>No</sharing_ipd>
  </patient_data>
  <!-- Results have not yet been posted for this study                                          -->
</clinical_study>


download date: ClinicalTrials.gov processed this data on September 20, 2023
link text: Link to the current ClinicalTrials.gov record.
url: https://clinicaltrials.gov/ct2/show/NCT04464993
org study id: R01CA239612
nct id: NCT04464993
lead sponsor: 
collaborator: 
has dmc: Yes
is fda regulated drug: No
is fda regulated device: No
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.
allocation: Randomized
intervention model: Factorial Assignment
intervention model description: 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 purpose: Prevention
masking: Single (Outcomes Assessor)
masking description: Outcomes assessor will not have access to study arm assignment and participants will be encouraged not to divulge their study arm assignment during assessments.
measure: Changes in Sedentary Screen Time
time frame: Baseline to 16 weeks
description: Minutes per week as measured by Stand UPTV app and activPAL
measure: Changes in moderate to vigorous physical activity
time frame: Baseline, 8 weeks, 16 weeks
description: Minutes per week as measured by activPAL
measure: Changes in time spent sitting
time frame: Baseline, 8 weeks, 16 weeks
description: Minutes per day as measured by activPAL
measure: Changes in time spent standing
time frame: Baseline, 8 weeks, 16 weeks
description: Minutes per day as measured by activPAL
measure: Changes in time spent stepping
time frame: Baseline, 8 weeks, 16 weeks
description: Minutes per day as measured by activPAL
arm group label: CORE
arm group type: Experimental
description: 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.
arm group label: CORE + text
arm group type: Experimental
description: 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.
arm group label: CORE + Lockout
arm group type: Experimental
description: 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.
arm group label: CORE + Earn
arm group type: Active Comparator
description: 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.
arm group label: CORE + Text + Earn
arm group type: Active Comparator
description: 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.
arm group label: CORE + Text + Lockout
arm group type: Active Comparator
description: 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).
arm group label: CORE + Earn + Lockout
arm group type: Active Comparator
description: 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.
arm group label: CORE + Earn + Lockout + Text
arm group type: Active Comparator
description: 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).
intervention type: Behavioral
intervention name: Device-based feedback, self-monitoring, and education: CORE
description: 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.
arm group label: CORE
arm group label: CORE + Earn
arm group label: CORE + Earn + Lockout
arm group label: CORE + Earn + Lockout + Text
arm group label: CORE + Lockout
arm group label: CORE + Text + Earn
arm group label: CORE + Text + Lockout
arm group label: CORE + text
intervention type: Behavioral
intervention name: Sedentary Screen Time lockout: LOCKOUT
description: 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.
arm group label: CORE + Earn + Lockout
arm group label: CORE + Earn + Lockout + Text
arm group label: CORE + Lockout
arm group label: CORE + Text + Lockout
intervention type: Behavioral
intervention name: Context-based prompts: TEXT
description: 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).
arm group label: CORE + Earn + Lockout + Text
arm group label: CORE + Text + Earn
arm group label: CORE + Text + Lockout
arm group label: CORE + text
intervention type: Behavioral
intervention name: Earn sedentary screen time through moderate-vigorous physical activity: EARN
description: 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.
arm group label: CORE + Earn
arm group label: CORE + Earn + Lockout
arm group label: CORE + Earn + Lockout + Text
arm group label: CORE + Text + Earn
criteria: 
gender: All
minimum age: 23 Years
maximum age: 64 Years
healthy volunteers: Accepts Healthy Volunteers
last name: Matthew P Buman, PhD
role: Principal Investigator
affiliation: Arizona State University
last name: Sarah Keadle, PhD
role: Principal Investigator
affiliation: California Polytechnic University - San Luis Obispo
facility: 
facility: 
country: United States
responsible party type: Sponsor
sharing ipd: No