I am going to run Chicago marathon, last year I ran NYC, through the race is started getting confuses about my strategy that was based on my pace, of course with the help of a GPS, at certain point it lost signal, also with the stress of the race I loose my mind. This time I am thinking on something easier, I am splinting it onto 4 races of 10Km each plus 2 Km extra, my idea is run it around 3:45:00, so each time that I cross a 10km mark I will know how much I am saving form an hour, this way I just need a chronometer, I already train with this plan, and mentally is easir due that I have 4 reachable goals, Dos it make sense to you????