Treadmill run at lunchtime, steady at 4.5mph. HR: avg.158, peak 166
I'm not sure why the HR is higher today. I woke up a bit early today so maybe that's it or maybe the AC was set a bit higher. It felt a bit harder too, but it's done now anyway. :)

Treadmill run at lunchtime, steady at 4.5mph. HR: avg.151, peak 163
Still wearing thin Xero sandals for these runs.