Jet Lag, more frequently understood as jet lag disorder, is in fact a minor http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/Jet Lag sleep issue which can An Open Suitcase really impact any person who rapidly travels throughout several various time zones. With jet lag, the clocks of both your internal clocks and your external clocks are out of sync. Other reasons for sleep disturbance can include jet lag and severe temperatures.