It looks as if the sensor itself had a bunch of fluctuations during the night. I don’t typically see my own BG levels fluctuate so wildly without provocation. I am exercising more and more consistently that I ever have before. My heart rate during workouts and while resting have gradually lowered over the last couple months. It seems I’m getting in better shape, so who know what the other unintended consequences of working off my blood sugar might be.