7.4 mile run

We ran the same run (old short loop ~ 7.37 miles), keeping our heart rate close to 145 bpm:
Marcy: 1h:09:34, average 9:27 min/ mile, average hr 144
Bob: 1h14:43, average 10:07 min/ mile, average hr 145, chirunnung focus = running on thin ice

Overall Marcy's HR stayed steadier say on hills and at a 'faster' slow pace, which shows her aerobic base is better. Bob had trouble staying at 145 - hr droped to 135, then would speed up to 150....