Somnul lung, de opt ore sau mai mult, poate scurta viata, potrivit unui studiu privind obiceiurile nocturne a mai mult de un milion de americani.
Rezultatele cercetarii au fost date publicitatii de oamenii de stiinta de la University of California din San Diego, care au studiat timp de sase ani peste un milion de persoane cu varstele cuprinse intre 30 si 102 ani. S-a descoperit astfel ca cei care dorm intre cinci si sapte ore pe noapte traiesc mai mult decat cei care dorm opt ore sau mai mult. Persoanele care se odihnesc numai patru ore, sau mai putin, se expun la aceleasi riscuri ca si cei care dorm mult. Cercetarea nu a reusit sa stabileasca insa nici o legatura intre rata mortalitatii si insomnie, dar a scos la iveala faptul ca somniferele din generatia mai veche sporesc riscul mortii. Se pare ca un somn prelungit este un factor de risc pentru cancer, precum si pentru bolile de inima si infarct, desi nu se cunoaste cauza. „Nu stim inca daca perioadele mai lungi de somn duc la o moarte prematura. Mai trebuie realizate studii pentru a stabili daca prin setarea soneriei ceasului mai devreme ne putem imbunatati starea de sanatate”, spune doctorul Daniel Kripke, coordonatorul studiului.
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