Fall brings cooler temperatures, warm blankets, pumpkin spice everything and our favorite autumn arrival, marathons. Some of the most notable races of the year are coming up in the next couple of months, and you can bet there will be a few first-timers at the starting lines.
The fitness training app Freeletics asked its 15 million users what they wish they had known before they ran their first marathon. Here's what they had to say:


