The Effect of Device-guided Breathing Exercises on Blood Pressure in Diabetic Patients With Hypertension (Resperate-3) A Randomized, Double-blind Controlled Trial

Rationale: Hypertension is an important risk factor of cardiovascular disease, especially in patients with type 2 diabetes mellitus (T2DM). A relatively recent development for the treatment of hypertension is the use of breathing exercises. The investigators\' previous studies with a breathing device did not show any positive results. However, these studies and other trials investigating the effects of breathing devices had not a double-blind design. Therefore, the investigators want to perform a randomized, double-blind, controlled trial in a population of T2DM patients. Objective: To determine the effect of a device slowing breathing (Resperate©) on office systolic blood pressure (SBP) in diabetic patients with treated hypertension with moderate BP control. Study design: A randomized, double-blind, controlled trial. Study population: Patients with type 2 diabetes mellitus, over 18 years old and a baseline systolic blood pressure between 140-160 mm Hg. Intervention: One group receives treatment with a breathing device (Resperate©) and the other group receives treatment with a \"control\" breathing device. The latter device does not try to alter the breathing pattern. Main study parameters/endpoints: The effect of the breathing device on SBP is the main study parameter. Secondary endpoints include diastolic blood pressure (DBP) and quality of life.