5 miles on way back from YMCA

5 m at 8.57 pace w/ avg HR of 166

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1 - 9.10/155 - (8.18/167)
2 - 8.43/166 - (8.43/172)
3 - 8.50/169 - (9.03/176)
4 - 8.43/166 - (8.43/180)
5 - 8.38/177 - (9.22/185)

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The parentheticals are the times/HR from the past Saturday's run which was on the same course (just about - the last mile was a little different, I ran up the hill to my house in this run whereas I looped the flat clubhouse driveway this past saturday).

This is pretty interesting on a few points:

* The difference that about 10-15 degrees in heat can make.
* Miles 2 and 4 were at the exact same pace, but with wildly different HR.
* I was running much faster over the last 4 miles on average, but with much lower HR.

I think it was also helped by that slow first mile warmup. Lesson learned there.