I’ve been using the recently released to public version of Loop for OmniPod for about a week, though only a few FULL days of that week, due to various issues, like bad G6 sensor, Loop build issues, etc. I won’t go into those because those were all due to my carelessness. I also upgraded to Dexcom G6 from G5 at the same time!
This post is primarily concerned with managing Loop for running. I’ve done several long runs already with Loop, using various methods, some more successful than other, but I’m learning still!
Loop also recently released the JoJo build, which supports several Overrides. These Overrides allow the user to sort of mimic temp basals. At least that is my understanding of them. I created a Running Override in Loop - Settings - Override, and set min and max to 110. This, for me, will essentially suspend insulin for the period I specified. I set it to run “Indefinitely”. Today, I selected the Running Override nearly 1 hour prior to run start. Loop immediately switched my basal to 0 since my BG was under 110 (the minimum setting).
This essentially worked very well. I’ve attached a Tidepool graph for the day.
Activate Running Override: 11:30 AM (Loop switched basal to ZB)
Run start: 12:30 PM, BG 90
Run end: 14:30 PM, BG 61, deactivated Running Override in Loop
I did go a bit low during the run, hence, I had to take in a few carbs, shown in the chart, about 6g of fruit jellies (Cosco Kirkland with no food coloring).
The strange thing is that since I’ve been on Loop, I no longer have huge SPIKES after the run, and in fact, as the red dots show at 3 PM in the chart, I continued to go down. I don’t know yet if this is unrelated, or just coincidental, but it has been consistent since starting Loop.
Hence, in hindsight, I think I should have taken in a bit more carbs during the run to prevent going low AFTER the run (which typically did not occur pre-Loop!). I had 15g of carbs after the run, for which Loop estimated 1.55U, which is too much for me. I think this was because my Active Insulin was negative (as calculated by Loop) due to the ZB. I was indecisive about taking that much insulin so I waited for 30+ minutes before dosing it, when I started to see a spike. So beware for those who are doing bolus per Loop after a prolonged ZB. I’ve had to eat additional carbs (one nectarine) to cover the extra insulin. But Loop is keeping me remarkably stable!! Even with all my mishaps during the run! A 19% SD is unheard of for me. Yesterday was 17% SD! I’m going to order a spare RileyLink!!