Jacobs, T.L., et al. (2013). Self-Reported Mindfulness and Cortisol During a Shamatha* Meditation Retreat. Health Psychology. Epublished ahead of print version.
From the Abstract: Cognitive perseverations that include worry and rumination over past or future events may prolong cortisol release, which in turn may contribute to predisease pathways and adversely affect physical health. Meditation training may increase self-reported mindfulness, which has been linked to reductions in cognitive perseverations.
*three-month meditation retreat in the Tibetan tradition