Unplanned exercise

Sometimes exercise or physical exertion occurs spontaneously, so that preparation isn't possible. You may need extra carbohydrate (or an insulin adjustment, or both) at these times to make sure you have the sufficient energy. A number of factors will determine what you need:

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• Snacks may be necessary for exercise beginning two hours or more after your last meal.
• You may need a snack if you exercise for an hour or more.
• Long-duration or all-day activities may require both a snack adjustment and an insulin adjustment.
• If you are attempting to lose weight, plan your exercise so you can limit the amount of extra food needed to keep your blood glucose from dropping too low.