circadian alignment evening types late chronotypes
Conditions
Interventions
Blue light exposure with sleep hygiene instructions
Sponsors
Philips Consumer Lifestyle
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: • Healthy men and women ages between 18 and 65 years • Social jetlag (difference between midsleep on workdays and days off), of at least 1 hour. • Sleep duration is shorter on workdays than on days off • If subjects are allowed to sleep at the time they choose, they have no sleep complaints • Subjects are motivated to phase advance their sleep times. • Subjects should be fluent in Dutch (because of the use of Dutch rating scales).
Exclusion criteria
Exclusion criteria: Other sleep disorders, eg sleep apnoea, narcolepsy, restless legs, primary insomnia; depressive disorder; shiftwork during the period 3 months prior to participation or transmeridian flights during one month prior to participation; colour blindness or visually impaired; serious eye problems, e.g. glaucoma; chronic use of medication; excessive daily amounts of caffeinated drinks, alcohol or drugs; the use of photosensitizing medication
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Main study parameter is the timing and quality of the sleep wake cycle | — |
Secondary
| Measure | Time frame |
|---|---|
| Secondary study parameters are the rhythm of melatonin, performance and sleepiness during wakefulness, adverse events and movements during sleep | — |
Countries
Netherlands
Outcome results
None listed