For a long time, I've set my life around a training schedule that lets me keep steady, low insulin doses. 5 days a week I'm training outdoors, and two times a week (every 2–3 days) I'm taking a "regeneration" day. These days I work around the house, and that generally suffices to keep #diabetes at bay. However, if I were to skip training for a second day in a row, I'd probably have to increase insulin doses 50%.
When I feel that I'm getting a cold, I usually try to take a "regeneration" day, and ideally start training again the next day. This way, I can avoid increasing insulin doses and usually fight off the infection quickly. Of course, if I end up staying sick for another day, I do have to increase insulin doses, and lower them again when I start training again.
My last infection was different, though. It was hard enough that on the first day, I had to increase insulin doses twice. It kept me feverish for almost a week, and a day after I suddenly had to lower insulin doses to the 150% level, resulting from little physical activity.