WatchWell: Simple and Practical Strategies to Reduce the Negative Health Impact of Sedentary Screen Time
1 other identifier
interventional
30
1 country
1
Brief Summary
The purpose of this study is to determine the feasibility, acceptability, efficacy, and participant adherence in using home-based technologies and wearable devices and simple, practical strategies to reduce the negative impact that evening screen time may have on your health.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable
Started Aug 2025
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
April 29, 2025
CompletedFirst Posted
Study publicly available on registry
May 9, 2025
CompletedStudy Start
First participant enrolled
August 7, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
July 31, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
July 31, 2026
February 25, 2026
February 1, 2026
12 months
April 29, 2025
February 24, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (3)
Treatment acceptability
Intervention acceptability will be assessed using the Treatment Evaluation Questionnaire (TEQ) to measure acceptability of the three experimental conditions following the completion of each condition. Scale Range: 0 to 4. Higher scores indicate greater acceptability.
2 weeks
Changes in Evening Sedentary Screen Time
Minutes per week of screen time after 5p as measured by WatchWell app and activPAL
2 weeks
Change in evening postprandial glycemic control (5pm - 5am)
Participants will be asked to wear the Dexcom G6 Pro continuous glucose monitor during baseline and experimental conditions. Glycemic control will be calculated by averaging all glucose readings from 5pm - 5am during each of the conditions.
2 weeks
Study Arms (6)
Blue light-Eating
EXPERIMENTALIntervention 1: Participants will be encouraged to wear blue light blocking glasses at 8pm until bed time. Intervention 2: Participants will be encouraged to stop eating at 8pm.
Blue light-standing
EXPERIMENTALIntervention 1: Participants will be encouraged to wear blue light blocking glasses at 8pm until bed time. Intervention 2: Participants will be sent notifications each hour on the hour from 5pm until bed time to stand for 10 minutes that hour.
Eating-Standing
EXPERIMENTALIntervention 1: Participants will be encouraged to stop eating at 8pm. Intervention 2: Participants will be sent notifications each hour on the hour from 5pm until bed time to stand for 10 minutes that hour.
Eating-Blue Light
EXPERIMENTALIntervention 1: Participants will be encouraged to stop eating at 8pm. Intervention 2: Participants will be encouraged to wear blue light blocking glasses at 8pm until bed time.
Standing-Blue Light
EXPERIMENTALIntervention 1: Participants will be sent notifications each hour on the hour from 5pm until bed time to stand for 10 minutes that hour. Intervention 2: Participants will be encouraged to wear blue light blocking glasses at 8pm until bed time.
Standing-Eating
EXPERIMENTALIntervention 1: Participants will be sent notifications each hour on the hour from 5pm until bed time to stand for 10 minutes that hour. Intervention 2: Participants will be encouraged to stop eating at 8pm.
Interventions
Blue light blocking glasses use and discouraged late night eating.
Encouraged not to eat past 8pm.
Encouraged to stand for 10 minutes per hour each out from 5pm to bed time.
Eligibility Criteria
You may qualify if:
- ≥26 years of age
- BMI ≥ 27 kg/m2\*; ≥25 kg/m2, if Asian (full or multiple race)\*\*
- Insufficiently active (per US National Guidelines for Physical Activity of 150 minutes of MVPA/Week)
- Reporting an average of ≥3 hours of recreational sedentary screen time (rSST) per day, that usually extends at least until 9:00pm.
- On a typical night, consumes calories (food and/or drink) after 8:00pm.
- Meet at least 2 criteria for metabolic syndrome
- Central adiposity: waist circumference \>40 inches (men); \>35 inches (women)
- Elevated blood pressure: SBP \>130 mmHg and/or DBP \>85 mmHg OR controlled with medication
- Low high density lipoprotein (HDL) cholesterol: \<40 mg/dL (men); \<50 mg/dL (women)
- Elevated triglycerides: \>150 mg/dL OR controlled with medication
- Elevated fasting glucose: ≥100 mg/dL OR controlled with medication
You may not qualify if:
- Conditions related to sleep disruption, including lactation, pregnancy, mid-night care providers, sleep disorders, severe sleep apnea
- History of hypoglycemia
- Pacemaker
- Caffeine consumption in excess and/or after 5pm (excess equals \>4 cups of coffee per day or equivalent)
- Involvement in other physical activity, diet, or weight loss programs/studies
- Weight change of 5% up or down in the last three months.
- Drug abuse
- THC use (smoking, edibles)
- Excessive alcohol use (for women, 8 or more drinks per week; for men, 15 or more drinks per week)
- Current smoker or user of any nicotine source - any amount or form (vapor/e-cig/tobacco/patch, gum, etc.)
- Medications that markedly impact glucose metabolism and sleep (insulin, corticosteroids, growth hormone, melatonin)
- Previous or current diagnosis of a clinical eating disorder (e.g., night eating syndrome, anorexia, bulimia, binge eating disorder); or self-report eating disorder behaviors
- Unstable or poorly controlled blood glucose (e.g., hypoglycemia, fasting glucose greater than 125 mg/dL)
- Chronic illness that may be associated with weight change (HIV/AIDS, active cancer, or uncontrolled thyroid disease)
- Shift work
- +5 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Arizona State University
Tempe, Arizona, 85281, United States
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Dorothy Sears, PhD
Arizona State University
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- SINGLE
- Who Masked
- OUTCOMES ASSESSOR
- Purpose
- OTHER
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Professor
Study Record Dates
First Submitted
April 29, 2025
First Posted
May 9, 2025
Study Start
August 7, 2025
Primary Completion (Estimated)
July 31, 2026
Study Completion (Estimated)
July 31, 2026
Last Updated
February 25, 2026
Record last verified: 2026-02