During your workout, you should be prepared to test your blood sugar (glucose) again, especially if you feel any symptoms of hypoglycemia, such as shakiness, confusion, or fatigue. Carry hard candy, a box of raisins, or glucose tabs in case you need fast-acting carbs to counteract low blood sugar. This is more of a possibility if you’re on insulin.
If you need the snack, stop exercising, wait 15 to 20 minutes, and then check your blood sugar again before resuming exercise, the American Diabetes Association suggests. Separately, remember to drink water while you work out since dehydration can affect your blood sugar level.
Test yourself after your workouts to see what impact the activity has had on your blood sugar. Understanding your pattern can help you avoid dangerous highs and lows.