So I have been for a few runs now. 2 then 5 then another 5 miles this morning.
I am experimenting with my heart rate monitor. I have set an alarm to notify me when I have reached 30 bpm below maximum. So far on my two 5 mile runs I averaged 34 bpm below max. The first run I managed 11:08 pace and today 10:58 pace. It felt like I was almost walking at times but I shall try for a bit longer and see if I can run faster at the same HR over the next few weeks.
These times/distances were taken off my watch. I didn't stop my watch properly at the end. More likely is that I stopped it and restarted by mistake, so those last few yards are a guess. By the end the watch had sort of done its job but not as thoroughly as I was hoping. I was initially running each mile to a set pace (9.00) but there was constant slippage. Some of that was due to me running more than the set distance but that doesn't account for all of it. I has to start running just slightly under 9 mm to keep the times in line with the mile markers. It wasn't much and it didn't cause any problems later. I did compromise on my pace during the mid/later sections so that I got to 20 miles nearly 2 minutes behind my 3 hour target but ahead of even pace. The fact that I didn't panic was the highlight of the way I tackled the run that day.