How is shift-work sleep disorder managed with light exposure?

How is shift-work sleep disorder managed with light exposure?

• A. Complete darkness at all times
• B. Rely on caffeine without light adjustment
• C. Bright light exposure during night shifts to promote alertness; minimize light exposure before daytime sleep; consider timed naps.
• D. Bright light exposure during daytime only

Answer: (C)

Light acts as the strongest cue for the body's internal clock, so managing shift-work sleep disorder hinges on using light to align alertness with the work period and create sleep opportunities when off. During night shifts, exposure to bright light helps keep you awake and shifts the circadian rhythm toward being alert at night. When heading home or preparing to sleep after a night shift, minimize exposure to morning light and bright environments to signal the body that daytime sleep is coming. Timed naps can be integrated during the shift to reduce fatigue and improve performance, coordinated with light exposure so wakefulness matches the night schedule. Together, bright light during the work period, reduced light before daytime sleep, and planned naps support realigning sleep–wake timing. Complete darkness at all times isn’t practical and doesn’t support adaptation. Caffeine without light adjustment doesn’t address the circadian cues. Bright light exposure during daytime only won’t correct the misalignment of a night-oriented schedule.

Light acts as the strongest cue for the body's internal clock, so managing shift-work sleep disorder hinges on using light to align alertness with the work period and create sleep opportunities when off. During night shifts, exposure to bright light helps keep you awake and shifts the circadian rhythm toward being alert at night. When heading home or preparing to sleep after a night shift, minimize exposure to morning light and bright environments to signal the body that daytime sleep is coming. Timed naps can be integrated during the shift to reduce fatigue and improve performance, coordinated with light exposure so wakefulness matches the night schedule. Together, bright light during the work period, reduced light before daytime sleep, and planned naps support realigning sleep–wake timing.

Complete darkness at all times isn’t practical and doesn’t support adaptation. Caffeine without light adjustment doesn’t address the circadian cues. Bright light exposure during daytime only won’t correct the misalignment of a night-oriented schedule.