Pre-T1 I was a fairly serious runner. I ran 20+ miles a week usually and raced competitively for my age. Post-T1, well, that’s a different story.
My basics: 49M, diagnosed T1 last year, on MDI. Take 2u of Tresiba in the morning and bolus with Humalog as needed. Still in honeymoon phase; my C-peptide is about 0.9. Last A1C was 5.0. My target range is 75-115, and I stay in there most of the time.
At the moment I’m running in the evenings because there are a lot of complications with the mornings for me, having to do with insulin resistance and a big foot-on-the-floor rise. In the mornings, my problem is getting stuck high. For now let’s focus on the problem of evening lows.
Normally I try to start a run at around 130bg. Because I’m on Tresiba, I can’t turn my basal off. I wait at least 4 hrs since my last bolus so I shouldn’t have any other insulin active. The problem is that by mile 3 I’ve already crashed down to 70 or below. And I’m not running too aggressively here: pace is lazy, between 8:00 and 8:30. (I would consider 8:00 a normal pace, 7:30-7:45 a speed training pace, and 7:10 a race pace.)
An example from today. Lunch was 11:49am, 3.5u bolus. Got ready to run at 4:40pm. I had Gu blocks and glucose tabs before starting and was at 137bg. All these are meter values, Dexcom G6 is beyond worthless while running for me. At mile 2 I felt a little low so I checked: 76bg. Had 8g of glucose tabs, waited 5 minutes or so, and set off again. When I got home at mile 3 I was 48bg. Had another glucose tab and waited 10 minutes, when I was finally up to 65bg. I had a post-run spike up to 104bg about 20 mins after that, at which point I injected and ate dinner.
So clearly that isn’t satisfactory. I could start at a higher bg, but my understanding is at 150 or so that works against you, not for you. That leaves fueling more and earlier on the run. Best options for this? I carry glucose tabs, Gu, and gel blocks. Other possibilities I haven’t thought of here?
Any advice welcome. If we get this dialed in, we can start working on those mornings…