Ever encounter a situation where no matter how many carbs you take in, your blood sugar just won't respond the way it is supposed to? I'm still trying to get a grip on this phenomenon but because it happens so rarely I can't totally grasp what causes it.
Wednesday was speed work day, with 2 miles of my goal marathon pace, then 4, 1 mile tempo pace repeats (about 30 to 40 seconds faster than goal pace) followed by 2 miles of marathon pace. I knew I'd need a decent amount of glucose on board for this run but nothing prepared me for the amount of food I'd have to eat right before it! I was a little low at 1:30 pm for lunch with a blood sugar of 71, so I had chicken with rice and a big chocolate chip cookie (training allows such delights!); I calculated 80 grams of carbs and bolused accordingly. an hour later I turned my pump down to 40% basal rate and had a clif bar (42 grams of carbs), at 3:30 I headed out for my 15 mile drive to the only flat stretch in Charlottesville and took in about 100 grams of carbs via my nutrition mix. However, when I got out of my car my blood sugar was just 108! I felt like my blood sugar was high, but my meter wasn't showing that - 2 more finger pricks confirmed a blood sugar below 115. Since I was training with a friend going home wasn't a real option.
So I did what any insane person would do, ate half a clif builder bar, 3 luna slices and a Gu - all in about 50 grams of carbs and waited until my bs started to trend up. After 7 minutes my blood sugar was up to 130 and I knew I had enough carbs digesting to make it through a Russian winter without eating so I headed out for my run. I finished my run with a blood sugar of 65 and was probably lower than that at points during the tempo intervals but know that my blood sugar reading wasn't indicative of the glucose in my system. An hour after my run my blood sugar was 240, so at least some digestion finally took place!
I have yet to figure out this absorption rate issue, I was well hydrated, hadn't eaten anything overly fatty over the past few days and there were no environment issues to speak of. I guess sometimes my stomach just wants to take the day off.