Dustin Joubert, M.A.Changes in the normal structure and size of the heart and its various chambers can indicate exercise training adaptations or disease. Of particular concern is the size and shape of the left ventricle, the hardest working chamber of the heart, which is responsible for ejecting blood through the entire body. It is generally accepted that the type of exercise training causes specific changes in characteristics of the left ventricle. Endurance exercise tends to increase the volum...