Most people who travel long distances complain of jetlag. Jetlag makes business travelers less productive and more prone{{U}} (51) {{/U}}making mistakes. It is actually caused by{{U}} (52) {{/U}}of your "body clock"—a small cluster of brain cells that controls the timing of biological{{/U}} (53) {{/U}}.The body clock is designed for a{{U}} (54) {{/U}}rhythm of daylight and darkness, so that it is thrown out of balance when i{{U}} (55) {{/U}}daylight and darkness at the "wrong'' times in a new time zone. The{{U}} (56) {{/U}}of jetlag often persist for days{{U}} (57) {{/U}}the internal body clock slowly adjusts to the new time zone. Now a new anti-jetlag system is{{U}} (58) {{/U}}that is based on proven{{U}} (59) {{/U}}pioneering scientific research. Dr. Martin Moore-Ede has{{U}} (60) {{/U}}a practical strategy to adjust the body clock much sooner to the new time zone{{U}} (61) {{/U}}controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates{{U}} (62) {{/U}}of the discomfort of jetlag.
A successful time zone shift depends on knowing the exact time to either{{U}} (63) {{/U}}or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule{{U}} (64) {{/U}}light exposure depends a great deal on{{U}} (65) {{/U}}travel plans. Data on a specific flight itinerary and the individual's sleep{{U}} (66) {{/U}}are used to produce a Trip Guide with{{U}} (67) {{/U}}on exactly when to be exposed to bright light.
When the Trip Guide calls{{U}} (68) {{/U}}bright light you should spend time outdoors if possible. If it is dark out-side, or the weather is bad,{{U}} (69) {{/U}}you are on an aeroplane, you can use a special
light device to provide the necessary light{{U}} (70) {{/U}}for a range of activities such as reading, watching TV or working.