When the going gets tough...

I often have really bad days running and I guess I have flukey days too. The other day I rode into the Tan to do a flat 5km tempo. My goal time was 23 minutes, 55 seconds (4.47 per km). I didn't think it'd be too difficult considering I'd ran 23.05 only 10 days earlier. But it was hard! I ran and ran and ran as fast as I could but I still finished in 24.24. Maybe I was tired from the ride in (or the speedwork two days before). Or maybe I was just having one of those days.