Compare these two Sufferfest (Hell Hath No Fury) rides a little over a month apart. Check out the heart rate profile:
1:16:10 21.02 miles Ave HR 123 Max HR 152
Slight false start removed for this calculation. 1:16:40 22.0 miles Ave HR 112 Max 138
I’d would say that is progress, 30 seconds more, 1 mile more, 9bpm average drop and 14bpm max!