More and more people today are very interested in jogging every morning and considered this activity as the best cardiovascular exercise. There might be even some of them who will entertain in their minds to go for marathon after jogging every morning for how many years and they feel as if they can tackle marathon easy. They can do this but first of all, they have to learn some good marathon running training to get ahead and of course, the most important this is to consult first their doctor or any physical trainer and see if they are qualified to be a runner.