Strategies to decrease social jetlag: Reducing evening blue light advances sleep and melatonin

Decreasing evening blue light exposure led to an advance in melatonin and sleep onset on workdays.

• Circadian rhythms are influenced by a combination of genetic, physiological, and environmental factors, resulting in individual differences in sleep timing.
• Social jetlag occurs when there is a mismatch between the body's circadian clock and societal obligations, leading to irregular sleep patterns and accumulated sleep debt.
• Interventions aimed at reducing social jetlag included decreasing evening light exposure with blue-light-blocking glasses and increasing morning light exposure using curtains.
• While decreasing evening blue light exposure advanced melatonin secretion and sleep onset, increasing morning light exposure did not significantly affect these measures.
• Neither intervention resulted in a significant change in the extent of social jetlag, but evening light management may assist late chronotypes in adjusting to early schedules.

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