Cercetătorii de la universitatea din Liege, Belgia, au descoperit că persoanele care se culcă târziu şi se trezesc târziu, dau mai mult randament şi pot să lucreze mai multe ore decât cei care, în ideea că se odihnesc bine se culcă şi se trezesc devreme.
Astfel, s-a luat un grup de oameni care au dormit acelaşi număr de ore, doar că unii s-au pus în pat devreme, altţii târziu în noapte. După ce s-au trezit, au fost puşi la treabă. Iniţial, în primele ore, persoanele din ambele grupuri au dat acelaşi randament. Ulterior, după circa 10 ore de lucru intens, cei care se culcaseră devreme au început să dea semne de oboseală. Ceilalţi erau la fel de odihniţi.
Rezultatele studiului au fost publicate în revista Science.
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