NCT06963736 · Arizona State University
WatchWell: Simple and Practical Strategies to Reduce the Negative Health Impact of Sedentary Screen Time
What this study is about
The purpose of this study is to determine the feasibility, acceptability, effectiveness, 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.
View original scientific description
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.
Interventions
BEHAVIORAL
Blue light
Blue light blocking glasses use and discouraged late night eating.
BEHAVIORAL
Eating
Encouraged not to eat past 8pm.
BEHAVIORAL
Standing
Encouraged to stand for 10 minutes per hour each out from 5pm to bed time.
Primary outcome measures
Treatment acceptability
Time frame: 2 weeks
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.
Changes in Evening Sedentary Screen Time
Time frame: 2 weeks
Minutes per week of screen time after 5p as measured by WatchWell app and activPAL
Change in evening postprandial glycemic control (5pm - 5am)
Time frame: 2 weeks
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.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- ≥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
Exclusion criteria
- Conditions related to sleep disruption, including lactation, pregnancy, mid-night care providers, sleep disorders, severe sleep apnea
- History of hypoglycemia
- 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.
- 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)
- Recent or upcoming jetlag (travel 3 months prior and during study that is \>1 time zone away from Arizona)
- Current practice of evening and nighttime blue light blocking.
- Poorly controlled hypertension (SBP ≥165 or DBP ≥100)
- Any condition or circumstance that would prevent compliance to the protocol
- Use non-android phone as their primary/personal phone
Where
- Tempe, Arizona
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Feb 25, 2026 · Source of record for eligibility and locations