Research from Osaka Metropolitan University shows thatMorning light conditions before you wake up can affect your sleep quality, ahead of timeTwenty minutes of natural light is more effective at increasing morning wakefulness than no light or continuous natural light starting at dawn.
Sleep is an integral part of daily life, but modern lifestyles and constant exposure to technology products have led to reduced sleep time and increased fatigue. The bedroom environment, including factors such as lighting, noise and temperature, is often overlooked in home design despite its importance.
Most sleep studies rely on artificial lighting because of its controllability, but researchers at Osaka Metropolitan University say natural light may better replicate real-life conditions.
To explore this, Xiaorui Wang, a student in the Graduate School of Human Life and Ecology, and Daisuke Matsushita, a professor at the Graduate School of Human Life and Ecology, led a study that investigated whether introducing moderate amounts of natural light into the bedroom shortly before waking up could improve morning alertness.
Moderate exposure to the sun before getting up can have a positive effect. Image source: Osaka Metropolitan University
The research team designed an experiment involving 19 participants. They tested three scenarios using blackout curtains and motorized devices:
Condition IA: Introduce natural light 20 minutes before waking.
Condition IB: Natural light from dawn to wake.
Condition CC: No natural light introduced before waking up.
After each session, participants' sleepiness, alertness, and fatigue were measured with electrocardiograms, electroencephalograms, and surveys.
The results of the study showed that participants were less sleepy in the IA and IB conditions than in the CC condition. In addition, IA is considered one of the most effective methods to increase arousal, as excessive light under IB conditions can have adverse effects.
Professor Matsushita said: "In the future we hope to be able to control the natural light in the sleeping environment that changes with the season and time of day, and clarify how to introduce natural light suitable for a more comfortable wake-up."
Compiled from /ScitechDaily