Notes
BT: Negative splits. On an out-and-back course go out the first half in heart rate 1-2 zones. Turn around and come back in heart rate 3-4 zones. Relax!
OK run. Mile splits/avg HR:
12:02/156
12:12/161
11:44/165 (started to pick up the pace about halfway through this mile)
10:15/181
10:09/188