Sleep Deprivation, Circadian Rhythm Disorders
Conditions
Brief summary
The goal of this clinical study is to assess the effects of different photobiomodulation (PBM) conditions in men and women between 25 and 65 years old with daytime sleepiness/drowsiness and /or mild mood complaints but be otherwise healthy. The main question it aims to answer are: 1. Does PBM significantly affect health and well-being? 2. Are PBM effects wavelength dependent? 3. Are PBM effects pulse dependent? 4. Are the eyes needed to assert an PBM effect or is exposure only to the skin sufficient? 5. What are the cellular, metabolic pathways underlying the systemic effects of PBM. Participants will have to: 1. Exposed themselves 5 times per week during 2 weeks to the PBM stimuli between 9:30 and 12:30. 2. A week before the baseline measurement, participants will have to start wearing a Fitbit Versa 3, and will have to continuously wear until the end of the study. 3. In the afternoon of the baseline day as well as in the afternoons after 5 and 10 PBM sessions (week 1 and week 2, respectively), participants will have to go to the lab for blood withdraw. 4. In the evening of the baseline day as well as in the evenings after 5 and 10 PBM sessions (week 1 and week 2, respectively), participants will have to collect saliva samples as well as to complete questionnaires. It will be a double-blind placebo-controlled field study with a between subject comparison.
Detailed description
Five conditions (groups) will be tested: Dose (J.cm-2) Wavelength (nm) Pulse (Hz,ms) Duty factor Area Cond 1 6.5 850 15, 8 12% Skin + eyes Cond 2 6.5 940 15, 8 12% Skin + eyes Cond 3 6.5 850 100, 1 12% Skin + eyes Cond 4 0 850 15, 8 12% Skin + eyes Cond 5 6.5 850 15, 8 12% Skin
Interventions
DEVICEPBM
In this study, the health benefits of the addition of NIR to the light spectrum of a desk lamp already available in the market will be investigate; Ikea Ypeperlig, to which a module with high power Lumileds NIR-Leds will be attached with beam angle of 90 degrees. They will be attached in such a way that, when the lamp is installed in the right place, a 1sr beam that covers the users face, neck and hands and lower arms on the desk with the required intensity of 5mW/cm2 of NIR at the skin surface. The device will be equipped with 3 sensors: 1. A distance sensor connected to the driver of the NIR-leds, such that when the user leans forward or backward, the intensity of the NIR is automatically adjusted such that the intensity on the skin remains 5mW/cm2 (see figure below). 2. a presence sensor 3. ambient vertical lux sensor by which amount of light that enters the users' eye will be measured since it is known that these have an effect sleep, mood and performance.
Sponsors
Chrono@Work B.V.
University of Groningen
Seaborough Life Science B.V.
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
25 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
Healthy, no chronic disease * Age between 25 - 65 years. * Suffer from daytime sleepiness/drowsiness and or a mild mood disturbance (ESS \>5 or BDI equal to or higher than 13 but lower than 20, PSQI \> 5) * Participants will have to have a desk type of work and/or have 3 hours per day between 9:30 am and 12:30 at their office/home in which they could sit in front of the lamp.
Exclusion criteria
Depressive mood (BDI -II \> 20) * Pregnancy * Menopause symptoms * Drug use during the last three months known to interfere with sleep, alertness, the biological clock and/or light sensitivity (i.e. regular usage of sleep medication or stimulating substances) * Use of immune suppressants. High levels of caffeine intake during a day (5 or more cups, according to https://www.voedingscentrum.nl/encyclopedie/cafeine.aspx#blok7, there are no negative effects expected from 4 caffeine products in normal adults) * High alcohol intake (more than 4 for men and more than 3 for women, drinks per day) for more than 5 days in the past month, including binge drinking and heavy drinking according to https://www.niaaa.nih.gov/publications/brochures-and- fact-sheets/alcohol-facts-and-statistics. * Participant is not able to refrain from using recreational drugs during the 4 weeks of the study. * Shift work schedule in the 3 months prior to participation and/or planned during the 2 weeks of the study * Environmental factors in everyday life that may disturb sleep and cannot be prohibited (e.g. young children, noisy environment) * Travel over 2 or more time zones in the month prior to participation * Travel to sunny holiday locations/wintersports 1 month before participation * Personal plans that prevent them for using the intervention during 2 consecutive weeks
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in cortisol levels at bedtime after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Saliva |
| Change from baseline in targeted metabolomics concentration after 5 and after 10 PBM sessions | Baseline, after 4 weeks | Blood |
| Change from baseline in subjective mood after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Mood VAS scale, 0-10, higher score means better |
| Change from baseline in subjective drowsiness after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Epworth Sleepiness Scale, 0-24, higher score means worse |
| Change from baseline in depressions scale after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Beck Depression Inventory Second Edition, 0-63, higher score means worse |
| Change from baseline in general activation after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Activation-Deactivation check list, 5-20, higher score means better |
| Change from baseline in deactivation after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Activation-Deactivation check list, 11-14, higher score means worse |
| Change from baseline in high activation after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Activation-Deactivation check list, 5-20, higher score means worse |
| Change from baseline in general deactivation after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Activation-Deactivation check list, 5-20, higher score means worse |
| Change from baseline in subjective sleep quality scores after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Pittsburgh Sleep quality scale, 0-21, higher score means worse |
| Change from baseline in resting heart rate after 5 and after 10 PBM sessions | Through study completion | Fitbit Versa 3 |
| Change from baseline in objective sleep quality scores after 5 and after 10 PBM sessions | Through study completion | Fitbit Versa 3 |
| Change from baseline in IFN- gamma concentrations after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Blood |
| Change from baseline in TNF-alpha concentrations after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Blood |
| Change from baseline in TGF-beta1concentrations after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Blood |
| Change from baseline in il-1 concentrations after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Blood |
| Change from baseline in il-6 concentrations after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Blood |
| Shift from baseline in dim light melatonin onset after 5 and after 10 PBM sessions | Baseline, after 2 weeks, after 4 weeks | Saliva |
Contacts
Primary ContactMarina Gimenez, PhD
Backup ContactMichelle Luxwolda, MSc
Outcome results
None listed