I decided to do something different today and tried the stepping stones podcast with Laura. I did it once before a few months ago and found it a bit strange. Today it was still strange - the starting ten minutes at 150 felt really slow and even the final 'fast' 5 minutes at 160 was slower than my usual pace. However it was quite interesting to do as an exercise and kept me concentrating rather than drifting off.
I took run the map with me and so I could look at distance and splits. Overall my pace was slower than usual and I covered in 4.2k rather than almost 5 that I would normally do. What I didn't expect was the splits - I expected that I would be slower with the slower pace and faster with more BPM. However the stats show hardly any difference in pace between the six 5 minutes blocks at different BPM or each of the kilometres - very consistent. Has anyone else found this - and what might be going on!