Notes
61F 97%H 60DP, at the Peachtree Ridge High School Track. Protocol was 2wu+6(1m@1/2MPw400r)+2cd and I managed to hit all the paces. Wasn't as grueling as I had been expecting, especially given that I had only finished my previous run 10 hours beforehand, yesterday evening.
A security guard watched me for a couple of laps and then walked a couple of miles on the track while I was doing my thing. I was very surprised how low my heart rate stated for the speed intervals.
Used the 910xt.