• J Health Psychol · Jun 2020

    Randomized Controlled Trial

    The cortisol awakening response after sleep deprivation: Is the cortisol awakening response a "response" to awakening or a circadian process?

    • Ivan Vargas and Nestor Lopez-Duran.
    • University of Pennsylvania, USA.
    • J Health Psychol. 2020 Jun 1; 25 (7): 900-912.

    AbstractThis study tested whether the cortisol awakening response is dependent on the transition from sleep to awakening, or alternatively, a circadian-driven process that is independent of awakening. A total of 40 participants were randomly assigned to either a total sleep deprivation or a sleep condition. Salivary cortisol was also assessed. Participants in the sleep condition demonstrated a traditional cortisol awakening response, whereas participants in the total sleep deprivation condition showed no increases in morning cortisol. These results are consistent with the notion that if circadian-driven processes are related to the cortisol awakening response, they may only be activated when awakening occurs or is anticipated.

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