Jun 16 2008
Jet Lag: Tricking the Body’s Clock!

Five years ago researchers from Cornell University Medical College startled long-haul fliers by announcing a possible way to beat jet lag. The experiment seemed to show that light shined on the back of the knee could reset a person’s biological clock, bringing a traveler into balance with a new time zone (1). But the Cornell success proved difficult for other scientists to replicate, and a careful analysis of the study in 2002 (2) suggested that this jet lag cure might be, well, a flash in the pan.
According to Mary Carskadon, a sleep researcher at Brown University, jet lag affects 94 percent of people who travel across multiple time zones, and as many as 96 percent of airline pilots and flight attendants live in a permanent state of jet lag. Along with fatigue and insomnia, jet lag also can raise stress hormone levels and blood pressure and cause an irregular heartbeat and swollen limbs. Jet lag also may cause depression and other mental disorders like schizophrenia.
It is only recently that science has taken this disorder seriously and taken steps to find suitable treatments for it. The problem lies in the mismatch between the body’s internal daily rhythm and the light cues it gets from outside. Certain nerve cells in the brain keep the body functioning on a 24-hour cycle that affects sleep and other daily rhythms. This master timekeeper depends on light coming through the eyes to stimulate these cells and synchronize the cycle with day and night.
So what is the treatment for jetlag?
Clinicians often recommend bright light therapy to counter severe jet lag, but this can overwhelm the eyes. Other approaches include small doses of melatonin, one of the body’s pace-setting hormones. Melatonin appears to protect clock cells from inadvertently being reset by bursts of activity in other brain cells. This protective function might explain why melatonin also seems to work as a sleep aid, but it also means that an incorrect dose can aggravate jet lag.
Other mildly successful remedies include slow-release caffeine pills and exercise after a flight, but researchers are not sure exactly how these treatments work. Most people take one day for every time zone crossed to return to a normal sleep pattern, so patience is still the best “cure.”
Read alternative method at: http://www.antijetlagdiet.com/faqs.asp#how

