the.com/jet lag
Your body is still standing in the airport you left yesterday.
means The fatigue and disorientation that come from flying across time zones faster than your body's internal clock can adjust.
from A 20th-century coinage built from 'jet' (the jet aircraft that made long-distance travel fast enough to outrun your circadian rhythm) and 'lag,' meaning to fall behind. The term appeared once commercial jet travel became common, roughly the mid-1900s, as a plain, practical name for a very new human problem: bodies evolved for walking pace now crossing continents in hours, with their internal clocks left trailing behind.
- real cause
- circadian clock desyncs from local sunlight cycle
- direction bias
- flying east is worse than flying west
- recovery rate
- roughly one day per time zone crossed
- cheap fix
- morning sunlight resets the clock faster than melatonin