Cardiovascular Adaptations to Prolonged Physical Effort
Authors:
- 1 June 1954
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 9 (6) , 835-846
Abstract
Studies of the cardiovascular system were made among 26-mile marathon runners after at least five years of physical training. Studies made with the subjects at rest showed an electrocardiogram characterized by a vertical or semivertical electrocardiographic position of the heart in the chest, bradycardia, high voltage of the QRS complexes and high T and U waves. T waves which were low with respect to the height of the R waves were not encountered. Etiologically the heart was enlarged. Immediately after running 26 miles the transverse diameter of the heart was decreased considerably.Keywords
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