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

It’s the change of time, not the change of location, essentially.

You could be flying for most of your day and, in effect, not pass more than 60 minutes.

You could be on a train all day and not even change time zone, so time would pass like normal.