Born to move: Human hearts evolved to need exercise

Chimpanzees, which are humans’ closest evolutionary relatives, have hearts with thick, stiff walls. This adaptation reflects their need for short bouts of climbing and fighting. In contrast, prehistoric people had to hunt and gather food to survive, so the human heart evolved to have thinner, more flexible walls. These adaptations reinforce the importance of regular brisk walking or jogging throughout life to stay healthy. Young people who don’t exercise regularly may have hearts that more closely resemble chimpanzee hearts. This may contribute to high blood pressure later in life.