Searching for a possibility of an effective therapy of disturbances of peripheral arterial blood supply (stage I and II), the authors examined a medicamentously untreated group of patients as well as a comparable group of patients which was pretreated with propranolol. The two groups of patients performed twice a week an interval run exercise. Under the three-month training therapy in the two groups significant systolic and diastolic blood pressure reductions as well as statistically ascertained shortenings of the xenon-133-half-value time under working conditions and enlargements of the average functional vascular cross section A appeared. The distance of the intermittent claudication and the standardized moving up and down test prolonged. An influence on the microcirculation caused by propranolol could not be proved. The results are discussed on the basis of literature.