Having run only about 5x in the past six weeks, I figured Elliot might kill me if I raced two 5k's two days apart. So I decided to hold my effort at 80%. This in itself is a huge thing to ask of a competitive person, but I figured it was a good challenge. Two girls passed me in the first 100m, and I let them go. It wasn't even hard to do this - I was actually enjoying my 80% effort. I could look around at the scenery. I could breathe. My legs were not screaming at me.
In the final 800m I was passed by seven men, all who encouraged me to give a final kick. I smiled and let them go. 80% effort. It's actually a fun way to enjoy a 5k. Try it sometime.