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

Jet lag happens when your body’s internal clock gets disrupted by traveling across time zones quickly. Long flights can lead to jet lag because they cover a lot of time zones in a short time. Trains don’t usually cross many time zones fast, so they don’t cause the same jet lag feeling.