Here are some key quotes:
"Researchers at Carnegie Mellon University investigated how effective mindfulness meditation can be in countering the body’s stress response.
They randomly assigned 66 volunteers to either participate in mindful meditation for 25 minutes for three days, or go through a cognitive training program in which they learned how to analyze poetry passages. The people who meditated reported less stress, and even showed that they were better at coping with stress compared to those who relied on their behavior training.
The new study, published in the journal Psychoneuroendocrinology, is not the first to show the positive effects of mediation [sic]."