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Intervention EffectivenessNCT07371637

Charge Your Brainzzz: Evaluation of the Effectiveness and Implementation of an Integrated Approach to Improve Dutch Teenagers' Sleep Health

A study testing Charge Your Brainzzz in people with Intervention Effectiveness and Implementation Research, run by VU University of Amsterdam at 1 site in Netherlands.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

Poor sleep among teenagers is a major public health issue. Studies show that in the Netherlands, nearly half of adolescents don't wake up feeling rested, one in five feel sleepy during the day, one in four regularly wake up at night, 65% rate their own sleep quality as poor, and 43% sleep less than the recommended… Read more about this study

Who is it for?
Any ageHealthy volunteers can take part
What is being tested?
Charge Your Brainzzz
Could I receive a placebo?
No, everyone receives an active treatment
How many people
1,200 participants
Where
1 siteNetherlands
Study dates
1 Sep 2025to 1 Sep 2028
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages Any age
  • All sexes
  • Healthy volunteers accepted
  • Child, Adult, Older adult

Who may be able to join

  • Dutch regular secondary schools that include at least one vocational track (VMBO)
  • First-year students enrolled in the VMBO tracks of participating schools
  • Teachers, school health professionals, school care coordinators, school management, and the regional municipal health service's (GGD) Healthy School advisors who work with at least one of the participating schools

Who cannot join

  • non-regular Dutch secondary schools / special education

Trial locations and contacts

1 site in 1 country.

Netherlands1 site
  • VU University

    Amsterdam, North Holland, 1081HV

Other trials in Netherlands

About this study

Official title: Charge Your Brainzzz: Evaluation of an Integrated Approach to Improve Teenagers' Sleep Health

Poor sleep among teenagers is a major public health issue. Studies show that in the Netherlands, nearly half of adolescents don't wake up feeling rested, one in five feel sleepy during the day, one in four regularly wake up at night, 65% rate their own sleep quality as poor, and 43% sleep less than the recommended 8-10 hours per night. Over the past decade, teenagers' average sleep time has dropped by about 40 minutes.

Good sleep health means having a regular sleep rhythm with about 8-10 hours of quality sleep each night. This is crucial, because poor sleep in teenagers can lead to problems with thinking, learning, concentration, and school performance. In the long run, it also increases the risk of serious health issues such as anxiety, depression, obesity, diabetes, cardiovascular disease, and even dementia.

Read more

Because of these risks, schools, municipalities, and public health services are calling for effective ways to prevent sleep problems among teenagers. The Dutch "Healthy School" program has recently added sleep as a core theme, but proven, practical interventions are still lacking.

To address this gap, the Charge Your Brainzzz (CYB) program was developed. CYB is a comprehensive approach designed to help secondary school students improve their sleep and mental well-being. It is based on the Healthy School framework and includes all four pillars: education, environment, policy, and early detection.

In 2024, a pilot study tested the CYB approach for its initial effectiveness and suitability. Early results showed positive changes in sleep outcomes and strong appreciation from both schools and students. However, before CYB can be rolled out nationwide, more evidence is needed on its effectiveness, fit with schools, and how it can be sustained over time.

That's why this project will conduct a large-scale evaluation of both the impact of CYB and the processes needed for successful implementation. Alongside the effectiveness study, a practical roadmap will be co-created with schools, Healthy School Advisors, and local coordinators to ensure that CYB can be optimally implemented, sustained, and scaled up across schools, municipalities, and public health services across the Dutch public health landscape.

Read the detailed description

Poor sleep health among adolescents is a major public health problem. In the Netherlands, nearly half of adolescents report not waking up feeling rested, one in five say they feel sleepy during the day, one in four regularly do not sleep through the night, 65% rate their own sleep quality as poor, and 43% sleep less than the recommended 8-10 hours per night. Over the past ten years, adolescents' average sleep duration has decreased by about 40 minutes.

Sleep health refers to maintaining a regular sleep rhythm of approximately 8-10 hours of good-quality sleep per night. Sleep health is extremely important, because when teenagers sleep poorly, they may experience declines in cognition, learning ability, concentration, and school performance. Moreover, poor sleep in adolescence increases the risk of long-term health problems such as anxiety and depression, obesity, diabetes, cardiovascular disease, and dementia.

From both research and the practical experience of schools, municipalities, and public health services, there is a strong demand for effective interventions to address these problems through prevention among teenagers. The Dutch "Healthy School" program (Gezonde School) shares this sense of urgency and has recently added sleep as a core theme. However, proven effective interventions for practice are still lacking.

To fill this gap, the integrated Charge Your Brainzzz (CYB) approach was recently developed to support secondary school students in improving their sleep and mental well-being. The approach is based on the Healthy School framework, with well-substantiated applications of all four Healthy School pillars: Education, Environment, Policy, and Early Detection.

In 2024, a pilot study was conducted to evaluate the initial effectiveness and suitability of the CYB approach (Pilot Study results in draft, 2025). Preliminary results from this pilot evaluation showed positive changes in sleep outcomes and strong appreciation from both schools and adolescents. However, before schools, municipalities, and public health services can implement CYB nationwide within the Healthy School framework, it is important to establish clarity about the program's effectiveness, appropriateness, sustainability processes, and, above all, its efficacy. Therefore, a sufficiently large, controlled evaluation study is needed to assess both effectiveness in practice and the processes of implementation and sustainability.

This project will therefore evaluate both the effectiveness as well as the implementation and sustainability processes of the CYB approach. In parallel, a step-by-step plan will be co-created with schools, Healthy School Advisors, and local JOGG coordinators to enable them to implement, sustain, and scale up the CYB approach across schools, municipalities, and public health services.

Being tested
Charge Your Brainzzz
Keywords
sleep, adolescent, healthy school, charge your brainzzz, evaluation

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Charge Your BrainzzzBehavioural

    Charge Your Brainzzz is a comprehensive health promoting school approach intervention, designed to help Dutch secondary school students improve their sleep and sleep hygiene habits. It is based on the Health Promoting School framework and includes all its four pillars, i.e. (1) an education component, (2) a set of components that focus on involving students' (home) environment, a set of school policy changes related to school start times, schools' digital communication activities and schools' stimulation of daytime physical activity of students, and, lastly, (4) a set of tools that school health professionals can use to facilitate the early detection of potential (future) student sleep problems.

Study groups in NCT07371637
Study groupRoleWhat they receive
Intervention groupExperimentalNot described
Receives: Behavioral: Charge Your Brainzzz
Control groupNo interventionNot described

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Subjective sleep health

    Subjective sleep health will be assessed using a concise questionnaire that comprehensively covers the submeasures (1) sleep duration, (2) sleep quality, (3) sleep efficiency, (4) bedtime routines/sleep hygiene, (5) sleep timing, and (6) daytime sleepiness [1,2]. In addition to sleep health, the most relevant behavioral determinants will be measured at each assessment point, alongside the direct targets of the CYB program. These include, for example, the presence of household rules regarding bedtimes and wake-up times, as well as adolescents' sleep hygiene practices, with particular attention to evening screen use and the presence of a mobile phone in the bedroom at night.

    Time frame of data collection: prior to implementation of the program (T0), within two weeks after completion of the educational component, (T1), and at six-month follow-up after T1 (T2).

    1. Buysse (2014). https://doi.org/10.5665/sleep.3298
    2. Meltzer (2021). https://doi.org/10.1016/j.smrv.2021.101425

    Measured: From the start of the intervention until 6 months after its completion

  2. Objective sleep duration

    A random selection of approximately two classes per participating school will wear GeneActiv sleep monitors during the three measurement periods (T0, T1, T2) to objectively assess sleep duration and sleep quality. These sleep monitors will be worn continuously on the wrist for a period of five weekdays. These devices measure the activity pattern, temperature, and ambient light surrounding the student wearing them.

    Measured: During five weekdays directly prior to the start of the intervention's implementation, within two weeks after its completion, and six months thereafter.

  3. Objective sleep quality

    A random selection of approximately two classes per participating school will wear GeneActiv sleep monitors during the three measurement periods (T0, T1, T2) to objectively assess sleep duration and sleep quality. These sleep monitors will be worn continuously on the wrist for a period of five weekdays. These devices measure the activity pattern, temperature, and ambient light surrounding the student wearing them. Additionally, during these days, students will complete a sleep diary each morning (approximately 5 minutes).

    Measured: During five weekdays directly prior to the start of the intervention's implementation, within two weeks after its completion, and six months thereafter.

  4. Subjective Sleep Duration

    All participating students will complete a sleep diary each morning (approximately 5 minutes) in which they report their sleep duration.

    Measured: During five weekdays directly prior to the start of the intervention's implementation, within two weeks after its completion, and six months thereafter.

Secondary outcomes (9)
  1. Students' knowledge on healthy sleep

    An assessment of students' knowledge on healthy sleep, based on the content of what's being taught via the CYB intervention program

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  2. Students' attitude towards sleep health

    An assessment of students' attitude towards healthy sleep and their awareness of its importance to their health, wellbeing and ability to learn, based on the content of what's being taught via the CYB intervention program

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  3. Students' self-efficacy in relation to their sleep health

    An assessment of students' self-efficacy/skills in relation to regulating their healthy sleep habits, based on the content of what's being taught via the CYB intervention program

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  4. Students' subjective norms in relation to sleep health of their peers and parents

    An assessment of the subjective norm that students experience in their social environment in relation to healthy sleep habits.

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  5. Students' behavioral intention to sleep healthier

    An assessment of whether students have the intention to exhibit healthier sleep habitss as a consequence of their school participating in the CYB intervention program

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  6. Students' sleep hygiene practices

    An assessment of students' pre-sleep habits, or sleep hygiene practices, based on the content of what's being taught via the CYB intervention program

    Measured: Prior to intervention implementation (T0), within two weeks after intervention completion (T1), and six months after T1.

  7. Appreciation and acceptance of the intervention

    In the first school year following the start of the implementation of the program (T1), and again six months later (T2), semi-structured interviews will be conducted with implementers of the CYB approach, i.e., the various school professionals involved, in order to monitor and evaluate the implementation within the school setting

    Measured: In the first school year following the start of the implementation of the program (T1), and again six months later (T2)

  8. Facilitators and barriers in relation to the intervention's adoption, implementation and sustainment

    An assessment of the facilitators and barriers in relation to the adoption, implementation and sustainment processes of the CYB program

    Measured: In the first school year following the start of the implementation of the program (T1), and again six months later (T2)

  9. Ripple effects mapping

    The broader impact of the CYB program will be evaluated using the innovative systems-based evaluation method Ripple Effects Mapping (REM). Through this approach, we will work with implementers of the CYB program to capture, in real time, the overall impact of CYB. Ripple Effects Mapping provides an overview of both the direct and indirect effects of the various program components. These may occur within schools, within municipalities, at the level of the CYB program owner, or in other ways in which the intervention may have had unforeseen impact.

    REM sessions will commence once the CYB program has been expanded with activities beyond the school setting and will subsequently take place approximately every four months. During these sessions, time will be devoted to reviewing the actions and changes that have occurred in the past four months (retrospective analysis) as well as those that are expected or planned for the coming four months.

    Measured: Every 4 months after the start of the intervention's implementation

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Jan 2026
  2. Study start1 Sep 2025
  3. Primary completion1 Jun 2028 (estimated)
  4. Study completion1 Sep 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Non-randomised
Intervention model
Parallel groups
Model description
One group will receive the CYB intervention, while the other group will serve as a control group getting regular Dutch secondary school education
Masking
None (open label)
Enrolment
1,200 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07371637
Sponsor's protocol ID
CYB3
Status last verified
Sep 2025
First submitted
25 Sep 2025
Last updated
28 Jan 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Charge Your Brainzzz in people with Intervention Effectiveness and Implementation Research, run by VU University of Amsterdam at 1 site in Netherlands.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 28 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Netherlands. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Subjective sleep health (time frame: From the start of the intervention until 6 months after its completion). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Jan 2026.

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