I run track/xc for a D1 college. I typically run about 45-55 miles/week and I've recently added about 40 miles of stationery biking/week (I'm taking an indoor cycling class this semester). I'm graduating at the end of April and am considering doing the Pittsburgh marathon in May - I'd like to finish in under 4 hours.
When I do distance runs (6-12 miles), I typically carb up before the run and then disconnect from my insulin pump until I'm done running. My BG is generally pretty good afterwards, around 100mg/dL, but I don't know if it's safe to do this for 4 hours?
Does anyone out there run marathons or do >15 mile distance runs without insulin on board? Will I definitely go into DKA if I do this? Are there any better options out there?
I use an Animas Ping, and am on relatively low basal rates (.675-.8 u/hr) & I:C ratio (1:20-25) because of my weekly mileage.
Also, I eat a lot of carbs and I don't see that changing any time soon.