I have been following a Garmin Run Coach schedule for a half marathon. This is the new adaptive coach app that covers any distance and time and not the Galloway/MacMillan schedules. I am just over a couple of months in and the half marathon is in five weeks time. To date, the longest run in the schedule has been around 55 minutes. This is around half the time I am targeting for the HM. At the suggested pace, it would mean my longest run with five weeks to go is a little over five miles. I cannot see the planned runs more than a week ahead - presumably because it is dynamic and adjusts according to how closely you follow it. Does anyone know if the long runs will increase significantly over the final five weeks, should I trust in the plan or should I feel as nervous as I do about approaching a HM race having run no more than half that distance in training?