Imagine you’re planning your next 100 mile race, you’re writing the training, planning the long runs, figuring weekly mileage, detailing the specifics of the taper and deciding if any shorter tune up races would benefit you. The process is a lot like cooking Thanksgiving dinner–there is a lot to think about, and everything has to be timed perfectly. If you forget something the result will leave a bad taste in your mouth and might make your friends not want to come over again (OK hopefully not). Speed is the salt of any training program. You do not need much, but a little will make a big difference.