Record Mile

Warmer this morning, 49F so was able to run in shorts and one shirt, started with a warm up mile of 10:20, then miles of 9:32, 9:29, 9:28, 9:28, then kicked it in for a record mile of 7:45, then 9:49 and a cool down mile of 10:00. 8 miles in 9:29 overall, 161 AHR (174 AHR for my record mile). The 7:45 mile I was dying at the end.