Only 3 days?? Yes! Check out this study recently published and highlighted in a New York Times article. 35 unemployed men and women looking for jobs and under a lot of stress were taken to a retreat center. Half completed mindful meditation at the retreat while the other half were engaged in a faux mindfulness practice.
“There was more activity, or communication, among the portions of their brains that process stress-related reactions and other areas related to focus and calm. Four months later, those who had practiced mindfulness showed much lower levels in their blood of a marker of unhealthy inflammation than the relaxation group, even though few were still meditating.”