sub 40 10 k. Please advise

[robbie_1000]

I went out on Fri night ending up with a hangover the following morning which seemed to drag on for ever!
I left it quite late in the day (saturday) to do the 5k paced run> I checked my resting HR and it was up by 10-15 so i already knew i was going to struggle

L1 3.57s ahr 151 mhr 165
L2 4.06s ahr 166 mhr 169
L3 4.15s ahr 169 mhr 171
L4 4.26s ahr 169 mhr 171
L5 4.13s ahr 171 mhr 177

5k 21.01 secs:duh:

This one wasn't on the treadmill btw