1Into a rhythm
From 8.4 km to 13.4 km
5.0 km · -0.2% average · 28.7 km/h · 146 bpm, peaking at 154
That stretch near Widford accounts for your highest heart rate of the day, yet the effort came while you were still fresh. It is worth considering whether that tempo is a sustainable way to open a ride of this length.