Tuesday, November 4, 2008

Your Circadian Rhythm -Is It Keeping You Awake?

By Harold Ulvaeus

Your internal clock, or circadian rhythm, is closely connected to many forms of insomnia. Contrary to popular belief, circadian rhythm has more to do with the levels of light than the time of day. This internal clock is what tells us when to go to sleep, and when to wake up in thew 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.

The circadian rhythm is partially responsible for us feeling sleepy or sluggish with low energy, certain times during the 24 hour cycle, and for having abundant energy other times during the cycle. Those with a sleeping disorder related to their circadian rhythm tend to feel tired when they should be alert and vice versa. Those working the night shift tend to suffer from this type of sleep disorder.

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. - 14130

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