09/25/2019
Amazing!! Researchers found small but interesting differences between the swimmers and runners. While all of the athletes’ left ventricles filled with blood earlier than average and untwisted more quickly during each heartbeat, those desirable changes were amplified in the runners.
Since swimmers exercise in a horizontal position, he says, their hearts do not have to fight gravity to get blood back to the heart, unlike in upright runners. Posture does some of the work for swimmers, and so their hearts reshape themselves only as much as needed for the demands of their sport.
The findings underscore how exquisitely sensitive our bodies are to different types of exercise, Dr. Burr says.
Regular exercise changes the look and workings of the human heart. And researchers are discovering that different sports affect the heart differently.