I have been using this gps thinger for a while now. I think it is time to look at some data.
Yesterday I did 5.9 km. I tried to hold a steady pace all the way through. My average pace was 4:41 /km. The entire run is shown below.
I have noted why there are some of the spikes. (A spike in pace is me slowing down; it takes more time per km) All in all, I thought it went fairly well. Then I looked at the heart rate data. I think the phrase “oh shit” applies.
That enormous double spike in my heart rate is on the Cambie St bridge. The first one is definitely on an uphill but the second one (228 bpm!) is either right near the crest or is actually on the downhill. I am confused. I don’t recall any odd feelings. Maybe I got scared by something. That does happen sometimes.
Today I ran 12.1 km at an average pace of 5:19 /km; much more relaxed. Again, pace spikes are noted on the image.
This time the heart rate image is a lot more reasonable.
A few more statistics:
– yesterday my blog got its 1000th view
– since I started running my weight has gone from 70 kg down to 68.2 kg (I need to eat more food!)
– I have run more than 100 km since March 21
– I have completed the running for more than 20% of money pledged
– Saturday I will drink 5 beers
Eat Logical Sentences 
Love following the blog…..I am on my own training regime, but have invested all my discipline and effort to training, therefore none left for blogging, I commend your commitment to both!
Note: That spike appears to be an anomaly and possibly due to a technical error with equipment. But I hypothesize the error is in the drop between the 2 spikes and not the second spike. For example a poor connection between monitor and skin may have missed some beats(account for drop), or you may have been running near someone else with a HR monitor and picked up their reading, thereby confusing your equipment (possibly causing a spike??).
Also, your HR could to continue to rise for a short period after a high level of exertion before it begins to slow and recover, therefore the spike is after the maximal effort. Furthermore, 228 bpm, although high for the estimated average MaxHR, remember those charts/equations (ie 220-age, etc) are estimates and averages. Your MaxHR could naturally be high without cause for concern.
Just a few thoughts.