Many forms of insomnia are in one way or another related to the improper function of your circadian rhythm. Most people associate the circadian rhythm with a time of day, but in reality the circadian rhythm has more to do with light and darkness. Every person has an internal clock that lets us know when it’s time to go to bed and wake up in the morning.
The circadian rhythm IS the internal clock.These rhythms are to some degree governed by hormones secreted by endocrine glands throughout the day. And our body temperature and overall mental acuity and alertness are only some of the factors affected by the circadian rhythm.
Since the circadian rhythm influences alertness and our energy level, for those who have a sleep disorder related to their circadian rhythm, their internal clock is “off” and they tend to feel alert when they should be tired or sleepy, and tired when they should have much energy. This is very common for those working the grave yard shift.
Light is one of the most influential factors in regulating your circadian rhythm. When there are long periods of low levels of light there is a tendency to feel more fatigued and suffer from low energy. This is very common in the winter, especially in the northern areas where there is only a few hours of light per day.
Light therapy, using special types of light with specific wavelengths simulating natural light can be used to slowly reset the internal clock. The light therapy is easy and pleasant and requires 30-60 minutes of exposure in conjunction with a strict sleeping schedule. The light is usually delivered using specifically designed lights.
The key to success with light therapy is to time the light exposure correctly depending on your particular situation.
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