Heather..."rebound" or the Somogyi phenomenon was originally hypothesized to be a human biological phenomenon that took place at night when a diabetic dropped low. No soccer was being played. It was hypothesized to take place in adults and children. They have the same metabolic pathways. I believe the second study only involved children. No doubt the body does reacts to adrenaline with increased blood sugar while taking a test or participating in a swim meet. That is an entirely different phenomenon.