Can Blue-Light glasses and standing breaks fix your screen time health?
NCT ID NCT06963736
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether easy home-based strategies—like wearing blue-light blocking glasses, standing for 10 minutes each hour, and not eating after 8pm—can reduce the negative health effects of evening screen time. Researchers will track 30 adults with obesity or prediabetes who spend at least 3 hours on screens after 5pm. The goal is to see if these habits are acceptable and can improve blood sugar control and reduce sedentary time.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Blue light blocking glasses, standing breaks, and early eating cutoff
- What this could lead to
- If it works, this could point toward easy, home-based habits to lower blood sugar and heart disease risk from too much screen time.
- What could go wrong
- This is a very small, early feasibility study with only 30 people, so results may not apply widely. The strategies are simple but may be hard to stick with long-term.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 30 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Aug 2025
- Expected to finish
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Jul 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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26 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
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 * 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
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Arizona State University
RECRUITINGTempe, Arizona, 85281, United States
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