Short hill runs

I was able to leave work a little early and had to get out into the sunshine. I didn't have long so I had the choice of a quiet run (junk miles?) or a short hill session. I chose the latter!

Heart rate in pink

It's only a little hill but a pyramid set amounted to around 2km. I was surprised that my heart rate peaked at 160bpm as I felt there wasn't much more I could give. Perhaps that was due to limited leg power too?