A research team recruited 53 healthy volunteers between the ages of 45 and 64 for a two-year exercise program They found a corresponding improvement in measures of heart health, particularly left ventricular function  This is because the left ventricle pumps oxygen-rich blood through the aorta, supplying organs throughout the body  Lack of exercise and organ aging can make the muscles in the left ventricle contract less
People with a history of heart disease experience significant improvement in heart function after moderate exercise
  The team believe that moderate exercise can help reverse the effects of ageing on the heart muscle and reduce the risk of heart attack