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WatchWell: Reducing Negative Health Impacts of Evening Screen Time

This study, called WatchWell, is looking at simple strategies to reduce the negative health effects of evening screen time. It's testing behavioral changes like using blue light blocking glasses, avoiding eating after 8 PM, and standing for 10 minutes each hour from 5 PM until bedtime. You might be eligible if you are at least 26 years old, have a BMI (Body Mass Index) of 27 or higher (or 25 if Asian), are not very active, and spend at least 3 hours daily on recreational screen time, often until 9 PM or later. The study aims to see if these strategies are acceptable and effective in reducing evening screen time and improving blood sugar control after meals. The study plans to enroll 30 participants, but its current status is unclear.

Study design
This is an interventional study, meaning participants will receive specific interventions. It is a pilot study designed to enroll 30 participants.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
The primary endpoints, such as treatment acceptability and changes in evening screen time and blood sugar control, are measured at 2 weeks.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT06963736

WatchWell: Simple and Practical Strategies to Reduce the Negative Health Impact of Sedentary Screen Time

Recruiting
NAAges 26+Interventional
Arizona State University
~30 participants
Updated 2026-02-25 on ClinicalTrials.gov
What's tested:Blue lightEatingStanding

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Treatment acceptability
Measured over 2 weeks
+2 more outcomes measured

Conditions

Sedentary Time
Cardiovascular Diseases
Prediabetes
Obesity

Explore related trials

Cardiovascular DisorderObesityPrediabetes

Where it's being run

1 sites across 1 states
Arizona1

Study leadership

  • Dorothy Sears, PhD · PRINCIPAL_INVESTIGATOR · Arizona State University

Who to contact

Dorothy Sears, PhD
[email protected]
602-496-3351
Email the study team

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Do you actually qualify for this trial?

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Eligibility criteria

Inclusion

≥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

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
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

What this trial measures

  • Treatment acceptability2 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 Time2 weeks

    Minutes per week of screen time after 5p as measured by WatchWell app and activPAL

  • Change in evening postprandial glycemic control (5pm - 5am)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.