Moreover, while an hour-long Taekwondo class is not the same as going for an hour-long run, the constant physical motion will get your heart pumping at an increased rate. Of course, training your heart through cardiovascular exercise is essential for several different reasons. First of all, a stronger heart means that it can pump blood and oxygen to your muscles with increased efficiency, something that is important for increasing your physical output. The more blood and oxygen your muscles receive the longer and harder they can work without getting tired.
