As I mentioned in my post A recovery lesson learned the hard way, recovering properly after a run is hugely important. Especially if you don’t want to turn into a delusional rage-monster at risk of passing out at any moment. Not that I speak from experience, or anything …
It’s not only important to refuel but also rehydrate. Before I started the UofC Marathon Training Program, rehydrating properly involved a lot of guesswork.
On a day-to-day basis I think I am pretty good at continually drinking water at work, at home, in the car etc. But when I found out how much fluid you need to take in to rehydrate after a workout, I realized I had some work to do.