Run/walk 22:36  1.8 mi (12:33 / mi) +25ft 12:23 / mi
ahr:142 shoes: Saucony Cohesion
Tried upping the ratio of running to walking. Started with 2 min / 1 min. That worked for a while, but then I had to back off to 1:45 / 1:15 run/walk.
Sunny, warm, but a stiff breeze out of the SW.
Avg HR is from the Apple watch. I'm skeptical of it, because I took my pulse with 10 seconds of each running interval, and it was never higher than 130 or so.