Exploring How Trait Mindfulness Relates to Perceived Stress and Cardiovascular Reactivity.

Abstract

Mindfulness interventions have been associated with less global perceived stress as well as attenuated cardiovascular reactivity. The aim of the present study was to evaluate whether high levels of trait mindfulness would also be associated with these benefits. Participants were 99 healthy young adults aged 18-25years. Self-report measures included the Five Facet Mindfulness Questionnaire and the Perceived Stress Scale. Participants completed a laboratory stress protocol comprised of a resting baseline, a mental arithmetic stress task, and a resting recovery period. Blood pressure, heart rate, and heart rate variability were measured throughout the protocol. Regressions were used to analyze whether trait mindfulness predicted global perceived stress, cardiovascular reactivity, and cardiovascular recovery. Two trait mindfulness facets were found to be associated with less global perceived stress, Acting with Awareness (β= - .306, p= .002) and Nonjudgment (β= - .342, p< .001). Exploratory analyses also revealed an interaction between the Observe and Nonreactivity facets (p= .002), such that the Observe facet was associated with less stress only when Nonreactivity scores were also high. Although trait mindfulness was not a significant predictor of the physiological variables (p> .05, Cohen's f2< .060), exploratory analyses revealed an interaction between the Awareness and Nonjudgment facets (p< .001), such that Awareness is associated with lower diastolic blood pressure reactivity only when Nonjudgment scores are also high. Like mindfulness interventions, trait mindfulness is associated with less global perceived stress. Interactions between trait mindfulness facets that reflect attention monitoring and acceptance might predict physiological reactivity in certain contexts, though a mindful state might be necessary for most real-time cardiovascular benefits.