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Human beings including all other living organisms have an internal clock known as the biological clock. This clock is responsible for regulating the 24-hour sleep-wake cycle, or the Circadian Rhythms. Among all other factors, light is the primary cue to cast its influence on Circadian Rhythms. When the sun rises every morning, the brain signals the body that it’s time to wake up. Similarly, at night when the there is lesser light, the brain identifies it as the time to take rest and triggers a hormone known as Melatonin to make you sleepy.

It is very likely to feel groggy, disoriented and sleepy when your Circadian Rhythms are disrupted. As a matter of fact, this rhythm is linked to a variety of sleeping problems and sleep disorders. Abnormal Circadian can lead to depression, bipolar disorder, and seasonal affective disorder, or the winter blues.

Jet lag sleeping problems

Jet lag is a temporary disruption in the Circadian Rhythms. Such type of anomalies generally occurs when you travel across time zones. Symptoms include daytime sleepiness, headache, fatigue, stomach problems and insomnia. After flying across two or more time zones, the symptoms typically appear within a day or two. Duration of flight and direction of flight also makes a difference in the intensity of the symptoms. Flying East tends to cause worse Jet Lag than flying West.

In general, it takes one day per time zone to adjust to a place’s local time. So, if you fly from Los Angeles to New York, crossing three time zones, your Jet Lag should go away within three days. However, Jet Lag can be worse if you:

  • Were sleepless during travel.
  • If you are under a lot of stress
  • Drink too much alcohol or caffeine.
  • Didn't move around enough during journey.