What kind of exercise do you do? I havent been good with exercise at all lately between school and work but I used to brisk walk for 45 minutes a night and it didnt really affect my sugars during the night..I had overall good numbers throught the day and night but i didnt see any particular changes.
The only form of exercise that really makes a difference for me is swimming! whew I cld eat a whole meal without having to give any insulin after i swim.