New research shows that an elite endurance horse, like a top racehorse, is likely to have a largerthan-average heart.
Investigators at the University of Pennsylvania took echocardiographic measurements of the hearts of 34 Arabian horses, 23 of whom were considered elite endurance athletes based on recent competition results. They found that during both phases of the heartbeat, the left ventricle0 was larger in the most successful endurance horses than in average competitors.
This, explains Meg Sleeper, VMD, means that “more blood is being pumped into the body with each heartbeat,” potentially fueling a better performance. The correlation was so strong that every study horse in the elite group could be identified by this