ORIGINAL ARTICLE: PDF OnlyPalatini Paolo; Mormino, Paolo; Mos, Lucio; Marco, Attilio Di; Munari, Luigi; Torre, Mariarosa Del; Valle, Fabrizio; Pessina, Achille C.; Palù, Cesare DalJournal of Hypertension: December 1988 - p S88-90 Buy Abstract We have previously reported that blood pressure during running shows a peculiar pattern attributable to the beat phenomenon. To elucidate the mechanism behind this phenomenon in 10 amateur athletes, intra-arterial blood pressure was continuously recorded using the Oxford technique. During the run, each athlete carried on his chest a container filled with saline kept under pressure, connected to a second transducer. In the container, pressure waves ranging in amplitude from ± 10 to ± 62 mmHg were recorded. Their frequency was equal to that of the athletes' strides. When these waves were added by computer to the blood pressure tracing recorded during a bicycle ergometric test, the resultant harmonic proved to be similar to the tracing observed during running. The present results demonstrate that the running-induced blood pressure pattern is the sum of the accessory wave generated by the rhythmic aortic shocks produced by running locomotion and the normal sphygmic wave. © Lippincott-Raven Publishers.