a condition that is characterized by various psychological and physiological effects (such as fatigue and irritability), occurs following long flight through several time zones, and probably results f, extreme tiredness and other physical effects felt by a person after a long flight across different time zones, physiological desynchronization caused by transmeridian (east-west) travel between different time zones, ajavahestress, mida põhjustab kiire ajavööndite ületamine, eriti lendamisel läänest itta, füsioloogiline ja psühholoogiline seisund, mis on tingitud päeva pikkuse muutumisest reisides üle ajavööndite piiride, kiirest ajavööndite vahetusest tingitud une-ärkveloleku rütmi häire