none
Conditions
Interventions
Sponsors
Seaborough Life Science B.V.
Eligibility
Inclusion criteria
Inclusion criteria: • • Healthy, no chronic disease • Age between 25 – 40 years • Average sleep duration during a week 5) • Dutch speaking • Participants will have to have a desk type of work and/or have 3 hours per day between 10:30 am and 13:30 at their office/home in which they could sit in front of the lamp.
Exclusion criteria
Exclusion criteria: 1. Depressive mood (BDI -II > 13) 2. Pregnancy 3. 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) 4. Use of immune suppressants. 5. High levels of caffeine intake during a day (5 or more cups) 6. High alcohol intake (more than 4 for men and more than 3 for women) for more than 5 days in the past month 7. Participant is not able to refrain from using recreational drugs during the 4 weeks of the study. 8. Shift work schedule in the 3 months prior to participation and/or planned during the 4 weeks of the study 9. Environmental factors in everyday life that may disturb sleep and cannot be prohibited (e.g. young children, noisy environment) 10. Travel over 2 or more time zones in the month prior to participation 11. Travel to sunny holiday locations/wintersports 1 month before participation 12. Personal plans that prevent them for using the intervention during 4 consecutive weeks
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Mood, sleepiness, subjective/objective performance, need for recovery, cortisol. Sleep timing and quality, melatonin rhythms, heart rate variability, immune response. | — |
Secondary
| Measure | Time frame |
|---|---|
| Vitamin D and skin temperature | — |
Contacts
Public ContactMarijke Gordijn
Chrono@Work B.V.
Outcome results
None listed