I ran a marathon for training on Monday, and I crashed at mile 23 at a moderate training pace. I had enough gu in my system but dropped super fast from 150-80. 80 is fine, I’m happy running at 80. The speed of the drop is what made me scared and feel bad so I walked miles 23 and 24. You can tell when I crossed the finished line and relaxed because my stomach absorbed all the gu in my stomach and spiked to over 200.
This was a training run (4:30/ but would have been more like 4:10 without the 2mi walk), but I’m really hoping for a PR and a BQ (3:30) Dec3 at CIM.
I reduced lantus from 16 to 15 units the night before (still ended up a little too much basal I think). Breakfast 2.5h before was a picky bar + 1gu and 1 unit. 1 more gu 30min before. Race started at 6:30 and i had a gu at miles 5/10/15. I was rising steadily(around 150) so I skipped the mile 20 gu but then I dropped so I ate another at mile 24.
I woke up low-ish (I’m honeymooning/basal needs vary), the first spike is breakfast. The pre-race gu at 6 for the 6:30 start. I think the gradual rise from 75-150 begins at the point my breakfast humalog wore off. The quick drop back to 80 is where I felt awful. I think it was because my stomach decided not to absorb anymore. The the gigantic spike is when it started working again after the finish.
That didn’t happen 2 weeks earlier at the Pikes Peak Marathon (a 7 hour endeavor with 8k ft of climb); that was longer and lower intensity. With some altitude and at least 10 finger pricks. I stayed 80-120 the whole time. Its adding in the extra intensity that shuts down my stomach even if my legs and lungs are fine.
Mostly running just spikes me but the marathon is different. I don’t like to spike either because I tore my calf muscle in March before I was diagnosed and couldn’t start running again until I was diagnosed at the end of May. I’m pretty sure it tore due to a high blood sugar cramp. I feel comfortable if I run for a long time at a very low intensity but this was a slightly harder run and the effort level will be significantly higher to race it. For 5k to 10mi distance races I don’t have cgm data, but I’ll start at 80 and finish at 180 with no/minimal calories. That wouldn’t work for a full… I’m frustrated.