The review and of 12 published randomised trials set to examine the efficacy of mind-body therapies in hypertension reduction showed that meditation, yoga and guided imagery significantly reduce systolic and diastolic blood pressures.

The researchers compared these three mind-body techniques alone, in combination with conventional treatment to conventional treatment alone and to no intervention at all.
The study participants were all adults, men and non-pregnant women who had problems with high blood pressure, defined as a systolic blood pressure of 140 mm Hg and/or diastolic blood pressure 90 mm Hg.

The study results showed that mind-body therapies significantly reduced systolic blood pressure (SBP) by a mean 11.52 mm Hg and diastolic blood pressure (DBP) by 6.83 mm Hg. The greatest magnitude of 19.07 mm Hg in SBP and DBP by 13.13 mm Hg reduction was seen with yoga. Combination of yoga and meditation therapies led to reduction in SBP while yoga alone was the most efficient in reduction of DBP.

Amazingly, the absolute reductions in blood pressure were comparable to pharmacologic monotherapy in both effect size and temporality. Hypertension reduction with yoga interventions was associated with reductions in vascular death rates as well as decreased overall cardiac risk and the most important there were no side effects from these mind-body therapies.