Como o Cortisol Perturba o Sono e o Que as Evidências Sugerem
O cortisol segue um ritmo circadiano preciso e, quando esse ritmo é distorcido pelo estresse crônico, o resultado pode ser um sono fragmentado, despertar precoce pela manhã e um ciclo autorreforçador de desregulação hormonal. Compreender os mecanismos por trás dessa perturbação aponta para estratégias práticas e baseadas em evidências para restaurar a arquitetura normal do sono.
Criado com IAA relação entre o cortisol e o sono não é acidental. O cortisol é um hormônio com um ritmo diário rigidamente programado e, quando esse ritmo é alterado, as consequências alcançam praticamente todos os aspectos da saúde metabólica e neurológica. Para muitas pessoas, a experiência de acordar às 2 ou 3 da manhã, alertas e incapazes de voltar a dormir, pode ser uma expressão direta dessa desregulação hormonal, e não um simples problema comportamental.
Criado com IAA Arquitetura Circadiana do Cortisol e Por Que Ela Importa para o Sono
O cortisol não se mantém em um nível fixo ao longo do dia. De acordo com Thomas DeLauer, ele segue uma curva circadiana, subindo gradualmente a partir das 2h da manhã e atingindo o pico aproximadamente 30 minutos após o despertar. Esse aumento matinal é um evento fisiológico normal e necessário, fornecendo o sinal de alerta que ajuda o corpo a fazer a transição do sono para o estado de vigília. A noite, por outro lado, deve representar o vale dessa curva, quando o cortisol cai o suficiente para permitir que o sistema nervoso parassimpático domine e o sono se inicie.
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