HOW FAST CAN I RUN 5KM in HR Zone 2?

A return to my original challenge series! How fast can I run 5km whilst staying in HR Zone 2? This challenge took discipline and control to remain within the correct HR zone whilst keeping pace.
Adopting the 80/20 training method, you can watch my original attempt here:
• HOW FAST CAN I RUN 5KM...
#5kmrunning #Zone2 #pushyourself
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