I was wondering if you are on insulin do you lower the Lantus or long lasting insulin in the day or two ahead of a race like a half marathon or 10k?  I ran for about 40 minutes this morning on the treadmill and noticed that I dropped down to 80 after the run and had to use a couple of glucose tablets.  I was just curious if you lower the long lasting so  you won't go too low during a race?

I hadn't taken any Humalog or Novolog this morning either and it still did that even though I ate.