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Rise and shine: The use of polychromatic short‐wavelength‐enriched light to mitigate sleep inertia at night following awakening from slow‐wave sleep
Using blue-rich light at night to reduce grogginess after deep sleep
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Abstract
Exposure to polychromatic short-wavelength-enriched light after waking from slow-wave sleep reduced lapses in attention.
- Participants exposed to light had fewer lapses on a Psychomotor Vigilance Task compared to those in dim red light.
- Those receiving light reported feeling more alert and had improved mood on various scales.
- No significant difference was found in how quickly participants fell asleep after the testing period between the two conditions.
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Key numbers
χ[1] = 5.285, p = 0.022
Decrease in Attention Lapses
Compared to control condition during Psychomotor Vigilance Task.
F = 4.955, p = 0.029
Increase in Alertness
Measured by Karolinska Sleepiness Scale after light exposure.
F = 8.615, p = 0.004
Increase in Cheerfulness
Assessed via Visual Analogue Scale following light exposure.