You Asked: Is it bad to exercise on an empty stomach?

Are you the type to squeeze in a morning run before breakfast? Or hit the gym before dinner? Working out on an empty stomach won't hurt you—and it may actually help, depending on your goal.

But first, the downsides. Exercising before eating comes with the risk of “bonking”—the actual sports term for feeling lethargic or light-headed due to low blood sugar.