Two of my weekly runs are done after I've taken my kids to school. I enjoy these, in the morning light, in the lovely park. The other I have to do after work on a Wednesday. The Wednesdays (always R2) have been ok so far, though tougher than the morning runs, but tonight I wasn't looking forward to it at all. Although I managed it, I felt quite deflated afterwards. It was too dark and spooky in the park, so I took a different route, and there were some unavoidable (though gentle) hills. Funnily enough, my i-pod showed a decent distance and respectable pace compared to my previous runs, so why do I not feel the usual sense of accomplishment?