How Does Exercise Affect Your Heart?
The demand for energy is great during strenuous exercise such quick running, cycling, long-distance walking, or heavy weight lifting, but the oxygen supply to produce the energy is constrained. So, the heart rate increases to supply more oxygen and glucose to the respiring cells. In order to meet their energy needs, muscle cells engage in anaerobic respiration . Exercise improves the efficiency of the cardiac muscle. Your muscles assist in circulating blood throughout the body when you exercise, relieving some of the tension and work from the heart. Over time, the heart grows stronger and the effort required pumping blood decreases. As you start to exercise, your heart will beat more quickly and your circulation will rise, which will speed up the delivery of oxygen-rich blood to your muscles. The heart will strive to provide the growing demand for blood by increasing both the rate at which it beats and the force with which it contracts. Your heart will beat more frequently ...