“…Despite the long-term clinical benefits of an active lifestyle,[2, 3] multiple studies have described an acute transient decline in cardiac function after bouts of prolonged exercise in healthy subjects [9,10,11,12]. This response has been reported for indices of systolic and diastolic function, in both the left ventricle (LV) and right ventricle (RV), with a recent suggestion that alterations in RV function may precede changes in LV function [12].…”