antics, musings, and observations of an athlete mom with type 1 diabetes, living in Central California. I do what I can to see it frequently by foot, bike, and water.
Monday, December 17, 2007
Last year, I had some trouble with high BG's coming out of the swim at races and also at practices. At first I attributed it to being off the pump for an hour or more and under-dosing beforehand. But it still happened when I started wearing my pump while swimming. It doesn't happen all the time, though, so I'd really like to figure out what is going on and get a better sense for how consistent the pattern is (and how to deal with it).
Here's today's data:
5:10 AM 136
5:40 AM 155
5:45 AM start swimming--workout included 3 fast 300's and 1 fast 600, moderately intense pace with some easier, shorter sets
7:00 AM stop swimming
7:45 AM 211
I didn't eat anything this morning before or during the swim, and kept my basal at its regular rate of 0.575 U/hr. My pump was low on insulin (7 U when I got up); so perhaps the rise in BG was primarily due to that, especially since my BG was rising before I got in the pool. I've suspected that, when my pump is almost empty, the delivery is less accurate due to the accumulating air bubbles in the cartridge. The workout was fairly intense and sustained, which usually causes a rise in my BGs. Next time if my BG is rising, I will try giving a tiny bolus (0.1 U) and see what happens. I should also reincorporate eating beforehand, to improve the quality of my workout and to practice race conditions. (I'm trying to lose a few pounds and have been cutting out some of my training calories lately.)