Interval after putting my back out

30 min interval set pushing the HR into zone 4 and zone 5. This was a return session after putting my back (neck and under my shoulder blade) well out!
It was very much aimed at kill or cure. Luckily it was the latter.

Total Time (h:m:s) 0:32:16 5:51 pace
Moving Time (h:m:s) 0:31:59 5:49 pace
Distance (km) 5.50
Moving Speed (kph) 10.3 avg. 18.9 max.
Elevation Gain (m) +43 / -44
Avg. Heart Rate 159 bpm Zone 3.9