The relationship between the cortisol awakening response and cortisol reactivity to a laboratory stressor.

There was a significant relationship between trait CAR and cortisol secretion across the TSST. The results provided mixed support for hypotheses. A blunted CAR was associated with impaired recovery in cortisol secretion following the TSST, but, surprisingly, a rapid rise in cortisol peaking immediately following the stress task. Statement of contribution What is already known on this subject? The CAR and cortisol reactivity to an acute laboratory stress task both are thought to marshal the body's resources to deal with stress. Both the CAR and cortisol reactivity have been related to psychosocial states and clinical and health outcomes in past research. State CAR has been linked to cortisol reactivity to stressors, and a greater CAR is thought to help an individual deal with stressors in the day ahead. What does this study add? The current study predicts trait CAR sampled across multiple days from the rise and recovery in cortisol secretion across an acute stress test. Comparison of trait CAR and cortisol reactivity may clarify both their relationship to each other and to clinical and health outcomes.