I started my heart rate training 4 weeks ago and nearly all my runs have been in hot humid weather, so my initial thoughts on my HR to pace were that they were well out or that I must be a right lard-arse. Anyway, did a nice aerobic 8 miles this morning and my pace for the same heart rate was nearly 50 seconds a mile faster.
Now, the HR to Pace relationship seems much more realistic.
I'm baffled by how I compare to my training partner. Our real MHR and resting HR are pretty much the same -his 171/46 and he's 50 years old. Mine is 170/42 and I'm 53.
In races over the last year or so, he's generally 1 minute quicker than me on a 10k and perhaps 2 minutes on a half marathon (although I have beaten him on occassions, but 8 out of 10 races he'd probably just beat me)-so we're not too far apart really.
When we run aerobically together at the same pace, he's usually around 10-12 bpm lower than me, which suggests he has a considerably better developed aerobic base, yet his times don't reflect this.