Day 52 maf 4-35

This morning was my fastest time to top of the squinty bridge;a blistering 9-30,everything was looking good as i got to my previous 30 min turnaround at 27 min.At 30 min turnaround I found out why I was flying. Headwind all the way back..took 31 mins to get back @maf-5.This explains to me that controlling  speed as well as heart rate plays a part in steady state running