1Into a rhythm
From 5.3 km to 10.3 km
5.0 km · -0.3% average · 21.9 km/h · 137 bpm, peaking at 150
Your heart rate climbed noticeably through the Harnhill stretch even though the ground was flat and your speed never wavered—worth checking whether you were pushing the pace or just settling into a harder effort than the rest of the ride allowed.