Planning a holiday can be a stressful process in itself but the opportunity to get out of the normal day to day routine make it all worthwhile. However, changes in living routine particlarly a different bed or pillows can make it an unpleasant experience.
Long Journeys which involve sitting in one position, maybe slightly twisted in the seat because of the lack of leg room can affect the spine.
Lifting and carrying heavy suitcases in such a way that it is easy to strain the back.