Therefore, we aimed to evaluate and compare weekly body weight loss, food intake, and CORT serum levels between rats with 4 weeks of ad libitum or CRD all day (controls, C) and those with ad libitum or CRD offered only during 8 h of their activity phase (IF); also, we evaluated the animals’ anxiety parameters when performing the elevated plus maze (EPM) and their TRH mRNA content in the basolateral nucleus of the amygdala (BLA). The gene discussed is TRH; the disease is Anxiety.