Sounds good Meldy Which half are you planning on doing?
ive spent the morning working out HR Zones based on Friels lactate threshold tests. I've cross checked with lots of threshold sessions we've been doing in spin and with the PT and they appear to stand up to scrutiny.
Although I'm definitely still planning on using RPE for guiding effort on the planned training sessions, the heart rate zones should also give me some good feedback too.
ive been back over my threshold run sessions with the PT mentioned above. there is definitely a consistent trend one week in four where the max HR achieved is approx 10bpm lower than the other three sessions in the month. It seems to have a negligible effect of speed though. Average pace lower by 10 seconds per kilometre.