Inclusion Criteria:  males and females ages 18-55 years old subjective memory complaint (defined as answering "yes" to the following question: Do you feel that you have problems with your memory, whether it is a result of your epilepsy or due to your anti-seizure medications?) speaks English fluently able to provide written informed consent have no contraindications to 3-Telsa MRI EEG-confirmed diagnosis of IGE (IGE includes epilepsy syndromes such as juvenile myoclonic epilepsy, juvenile absence epilepsy, childhood absence epilepsy, and generalized tonic-clonic seizures alone) relatively healthy with no comorbid medical conditions besides epilepsy normal pre-enrollment structural clinical MRI of the brain no more than 4 seizure days/month in past 6 months having less than the American Heart Association recommendation of physical activity in adults (at least 30 min moderate-intensity aerobic activity at least 5 days/week (150 min total), or at least 25 min vigorous aerobic activity at least 3 days/week (75 min total) and moderate-/high-intensity muscle strengthening activity at least 2 days/week)  Exclusion Criteria:  underlying degenerative or metabolic disorders abnormal general or neurological examination abnormal brain MRI recent suicidal ideation in the last 3 months determined based on previous medical history pregnant or positive pregnancy test result on the day of the research session contraindication to an MRI scan at 3-Telsa mental handicap (FSIQ<80 if tested) or history of special education >4 seizure days/month in past 6 months concurrent participation in a different intervention study diseased or enlarged heart or blood vessels determined based on previous medical history high blood pressure that is not controlled by medications meeting the American Heart Association recommendation of physical activity in adults abnormal physical examination in which study physician determines subject should not participate in the exercise intervention