East or west? There is much debate about whether it is better to fly eastward or westward. It may be largely a matter of personal preference, but there is some evidence that flying westwards causes less jet lag than flying eastwards. Night or day flight? Again it is largely a matter of ...
Rapid jet travel across multiple time zones produces a temporary misalignment between the timing of the central circadian clock and the desired sleep times in the new time zone. This circadian misalignment often leads to nighttime insomnia (early insomnia after flying east, late insomnia after flying...