seems like a sensible plan to (slowly) add in some carbs, like a sweet potato or some rice (only) AFTER a run. I'm in the same boat. I've recently had the same experience, if I do consecutive days of Crossfit workouts, I'm draggin' ass the next day. Thinking about adding some carbs to my postworkout meal immediately after the first day's workout. We'll see later this week how it work's out.