When blood sugar is low from exercising what do i need to do to bring it back up?

Eat: it is as simple as that blood sugar responds to food. Eat complex carbs or proteins before or during your workout. You could also drink them.

Any simple sugar: Will bring up your blood sugar quite rapidly. Examples of foods containing simple sugars are things like fruits/fruit juices(which is why diabetic often reach for orange juice when their blood sugar is low), or honey. Remember if you are not a diabetic, exercise induced/post exercise hypoglycemia(low blood sugar) isn't that common.

Low blood sugar?: If you don't have diabetes why are you having low blood sugar? The blood sugar may go down a bit after exercising and it would never hurt to take some sugar (pill, drink, etc.). If you have diabetes and your blood sugar is low from exercising you should be able to recognize that before your exercise is over and have plenty of fluid with sugar.If you can, please let me know your blood sugar history