2/1/10 long run

On Monday, I had my first "long run" in my training program. It was a 6 mile run. I thought this run was going to be easy, but it turned out to be surprisingly difficult. I had trouble catching up with my heart rate at the beginning of the run. once I was in the zone, my legs got increasingly sore. I'm guessing I tried to pace too fast. Next time I plan on slowing things down to maybe an 8:00 minute pace.