For the study, which was published in the journal Evidence-Based Complementary and Alternative Medicine, half of the teens were trained in transcendental meditation and asked to meditate for 15 minutes with a class and 15 minutes at home for a four-month period. The other half was exposed to health education on how to lower blood pressure and risk for cardiovascular disease, but no meditation. Among the group that meditated, Barnes and his team found that left ventricular mass was significantly decreased.

