Notes
At the Alpharetta Big Creek Greenway, doing 8 easy at 75F with 70 DP = 145 TDP = 1.036 * 10:30 = 10:52.
On the 7 on pace miles I averaged: 10:21 with average HR of: 112. This is either due to better nutrition or lower temp.
The 920xt measured 8.22 miles, so an error of 0.08. 0.08 / 8.30 = .0096 or 0.01. Namely 1.01 * 8.22 = 8.3022 or 8.30