While most research involves people with severe sleep issues, daily light exposure will most likely help you even if you experience average sleep. It also reduced the time it took to fall asleep by 83% ( 19).Ī similar study in older adults found that 2 hours of bright light exposure during the day increased the amount of sleep by 2 hours and sleep efficiency by 80% ( 20). In people with insomnia, daytime bright light exposure improved sleep quality and duration. This improves daytime energy, as well as nighttime sleep quality and duration ( 16, 17, 18). Natural sunlight or bright light during the day helps keep your circadian rhythm healthy. It affects your brain, body, and hormones, helping you stay awake and telling your body when it’s time to sleep ( 14, 15). Your body has a natural time-keeping clock known as your circadian rhythm ( 13, 14). Increase bright light exposure during the day
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