If you are competing in a marathon, then you need to adopt this marathon training schedule into your routine. It’s an 18 week long schedule, and, if thoroughly followed, will have you more than ready to successfully run a marathon by the end of the 18th week. It gives you a precise routine of when to run, how many miles to run on any particular day, and what days to rest. Going into a marathon without being fully prepared will most likely result in serious injury to your body, from which you might not be able to recover from. Follow this routine to the letter, and you will successfully run and complete your marathon.