Eli5: how can a 14-15 hours flight trip can make you feel jet lagged but even a long 20 hours train journey doesn’t have the same effect?

Question

Is it because typically during these long flights there is a a change in multiple time zones and that messes your circadian rythm?

In: 541

Answer 1

I think a large part of it is the decompression/compression cycle.

You can get jetlagged on a two hour north/south route.

You shouldn’t get jetlagged on flights where the window shades are shut and the cabin lighting is the same as your home time zone – but you do.