Recovery 7 miles

Today's training: 6.90 miles, nbhrd loop, 1:09:05 (10:01 min/mi), avg 137 bpm/max 153/1:10 over 150
Update: I messed up the mileage above. It's actually 6.83 miles, which screws up the math below and makes my pace 10:07 min/mi.

I planned to run 8 miles but my need for a bathroom cause me to cut it short. I also think it might have elevated my heart rate in the last mile :-)

My heart rate was exceptionally low for this pace. I average 128 bpm for the first mile! My heart rate splits were 128, 135, 133, 138, 139, 139, 143. Through 5 miles my average was 135 bpm. Comparing to the other 5-mile recovery runs on the same course: 48:26/142, 50:14/144, 49:11/142, 51:12/139, 51:19/141, 51:34/139, 49:17/140, 49:43/138, 49:26/141, 49:46/135.

I might have turned a corner with Sunday's 18-miler where I kept my heart rate low the whole time. The weather, like on Sunday, was unseasonably cool. It was in the low 50's then and the same this morning. Race day just made it into the 10 day forecast. The high/low predicted is 72/53. Last night's low was 41 so I expect it will probably be near 60 by race time, getting up the upper 60's by the end. Should be cooler than the last marathon, but still warmer than what I've been training in for the last 7 weeks.

The foot pod distance was well off as expected. It registered 6.52 miles. 6.90/6.52 = 1.058. On Thursday it read 6.63 verus 7.00 on the treadmill. 7.00/6.63 = 1.056, so there's good agreement there. The current calibration factor is 1.038. I'll change that to 1.058*1.038 = 1.098. I'll need to watch this since I recall getting a high cal factor with new shoes last time that changed quickly.