Looking at the plot above my pace was very erratic. I wonder was I really changing pace as often as my Garmin suggests (it didn't feel like I was) or is the plot a function of the error in the Garmin?? Averaging the pace over my mile splits looks much more uniform...
Mile 1 - 7:06 - 143bpm
Mile 2 - 7:16 - 151bpm
Mile 3 - 7:19 - 156bpm
Mile 4 - 7:23 - 152bpm (Sundays Well - uphill)
Mile 5 - 7:50 - 157bpm (Sundays Well - uphill)
Mile 6 - 7:25 - 152bpm
Mile 7 - 7:26 - 156bpm
Mile 8 - 7:24 - 158bpm
Mile 9 - 7:13 - 159bpm
Mile 10 - 7:21 - 158bpm (73:44)
Mile 11 - 7:04 - 160bpm
Mile 12 - 7:01 - 164bpm
Overall 12.19miles in 1:29:10 @ 7:19min/mile average 156bpm.
Despite my heart rate being a couple of bpm higher than some of my previous long runs and despite averaging 7:19min/mile this was an 'easy' run that felt very easy too. I wasn't even out of breath at the end!! I've often felt worse after shorter runs at a similar pace maybe I'm finally developing into a long distance runner!!
Week Total (20/10/08 - 26/10/08) - 4 sessions
29.55miles - 3:35:28 - 7:17min/mile - 156bpm