It was my first run session in programme. The session requires me to run 10km at Zone 1 Heart Rate (152 bpm). It was impossible to stick to HR below 152 bpm let alone running exactly at that specified HR as my HR fluctuates easily. I had to run very slowly, I could be easily over taken by a grandma on walking frame should I run any slower. I had to walk at some point especially between km 2 and km 4 as my HR mysteriously shot up to 180, 190, 200s without any reason. I cannot understand how's that even possible as I did not increase my effort level or pace, and I did not feel any different. I managed to get my HR stable at some stretch and found my ideal pace to run in Zone 1 is around 6:40 min/km. My average HR for the session was 149 with maximum HR recorded at 214. Though I did not feel any signs of fatigue, I felt a little pain on my knee caps towards the end of the session but the pain was gone as soon as I completed the run. I hope that's normal. Here are the split: 6:19,...