Your Internal Clock - Is It Keeping Sleep Away?
by Harold Ulvaeus

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.

This internal clock within our body controls what is known as the circadian rhythm. These rhythms are associated with the regulation of many hormones that are released within our body throughout the day. For example, our body's temperature and overall alertness are key factors directly affected by our circadian rhythm.

Since the circadian rhythm influences alertness and our energy level, for those with 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.

One of the biggest factors in regulating your circadian rhythms is how much exposure you get to very bright light, especially sunlight. When you don't get enough light over a long period of time, such as during the winter, you may notice that you tend to feel more fatigued or have less energy when compared to the spring and summer.

Correcting sleep disorders caused by, or related to, your circadian rhythm can be done by light therapy specially designed to slowly reset your circadian rhythm. The light is delivered from what is called a "light box" which has the correct wavelengths of light. 30-60 minutes of exposure to the light in conjunction with a strict sleep schedule explains the therapy.

The time of day you use your light box is the most important thing to consider. The schedule would depend on your schedule and the type of insomnia you have.

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