That was strange. I've had instances of my blood sugar spiking on short intense runs like 5K races, for those I often inject a couple units of insulin 30 minutes prior to the race.
On long easy aerobic efforts, my blood sugar early in the morning usually remains fairly stable, after an hour begins dropping.
Today I did 10.2 miles, began slowing horribly after the first 5.1 was done and when I got back for the second time, my legs felt terrilbe. I found out why when I got inside and tested -- 282 mg/dl. I spiked up from starting out at 190 mg/dl and with about .5 units of bolus insulin to be used up over the next 2 hours. That situation there after two hours I would expect to be around 100 - 120 mg/dl.
All my overnight tests showed last night's Lantus shot was working right.
Maybe the cold temps my body reacted by releasing more glucose trying to keep warm?
I don't know. Although the bad blood sugar at the end does probably explain why I slowed down so badly during the run.
