The best running watches go beyond simply tracking your training; they provide active guidance to help you get fitter and perform at your best. Fueling reminders are a great example of this — your watch can help you stay on top of your nutrition so you don’t run out of energy during long workouts and races.
It’s a feature that I think is especially useful for marathoners, because you need to take on carbs throughout your longest training runs and the race itself to avoid hitting the wall and even with a strict nutrition plan in place it’s easy to forget when you’re 15-20 miles into a run.
