It's gone in and out of fashion. It's fashionable at the moment because what's been shown is that within the brain, a whole raft of genes have been shown to be turned on only during sleep, and those genes are associated with restoration and metabolic pathways.
Por momentos ha estado de moda y por momentos no. Está de moda en este ahora porque se ha demostrado que dentro del cerebro, toda una serie de genes se activan solo durante el sueño y esos genes están asociados con la restauración y las rutas metabólicas.