Thanks Wilf, yes it certainly is a lot of insulin! Especially for a runner. Anyway, to answer a couple of your questions: The apple was a big, juicy, Honey Crisp. She weighed it on the Salter Scale and used bolus wizard. It was 35 g according to the scale, however, I believe that those particular apples may have a lot more sugars in them...but, I don't know so we go by the scale. She bolused for the apple only 10 minutes before she ate it, instead of the 1/2 hour that she usually does for breakfast. This is what I think the issue is. As for rebounds from lows -- I don't know that we've ever experienced that except as the result of over-treating (which we see to be doing all the time). Soife is super sensitive to lows and feels them even in the 4.0s. We're trying to get her to treat with a light touch at this stage -- only 5g of carb instead of 15. I think, personally, that she simply needs MORE insulin at these key times. We are upping her basals slightly today during the key times, and instituting the early bolus. As for exercise, she had a day off yesterday as she is recovering from a cold and an injury -- so it was a lazy day. Thanks for your help.