It’s really strange….
When I decreased my basal by .05 units for 4 hours — from 8:00 pm to midnight — I saw my overall blood sugar increase slowly. It came to a “head” on Thursday, when I had a teacher workshop to sit in all day, so I put the basal rate back.
But I was still seeing the low postprandial blood sugars after meals. I plug the last 2 week and last 1 week TDD in a spreadsheet and watch it carefully, and today, I hit a carb ratio of 12 according to the Rule of 500. So, after a couple of days of stable blood sugars I decided to drop the bolus rate from 1:11 to 1:12.
So apparently, my bolus rate is decreasing with increased exercise and decreased weight, but it isn’t affecting the basal rate much. And that does mean that my TDD is also decreasing.