Anyway, getting back to topic, I'm not sure what my deal is but I'm not running 100% and haven't been for some time. And I don't think I'm the only one.
If you are talking about physically running, I am the same way. I have lost a ton of weight since the bomb and back close to my marathon weight. But when I run, I have absolutely nothing in the tank. I am constantly thinking of my situation and can not keep anything going physically. I often just end up walking for long spurts.