Why are long haul trips like airplane rides and bus rides so exhausting, even though all we do is sit?

Question

Why are long haul trips like airplane rides and bus rides so exhausting, even though all we do is sit?

In: Other

Answer 1

One explanation that I read is that on the busplane your body is exposed to constant vibrations.
Our brain sense them and try to compensate by moving muscles back-and-forth.

This lead to massive strain on muscles over whole body, you kinda do 10+h workout on a planebus and this make you exhausted.