<qa>  What was the name of the study that was approved by the Ethic Committee in Search withVolunteers: participated 12 volunteers diagnosed as hypertensive, both gender three men, 40 to 55 years old, overweight and practitioners of aerobic exercise walk at least three months. They were treated with anti-hypertensive medication of class beta-adrenergic receptor blockers, thiazides and enzyme convertor of angiotensin inhibitors, and showing systolic and diastolic pressoric values controlled and habituated to coffee consumption. Would be excluded from the study volunteers who presented migraine or other withdrawal symptoms due to a washout to be carried out for coffee and other caffeinated foods. The volunteers participated of this study for average one month. This study was previously approved by Ethic Committee in Search with Humans at Hospital Lauro Wanderley, at Federal University of Paraiba, under protocol 212011. All volunteers was previously clarified about the experimental procedures, and they signed the written informed consent according resolution 46612 at Health National Council Brazil. 