Walking Interventions, Cognitive Remediation and Mild Cognitive Impairment

Inclusion Criteria: * Men and women meeting all criteria listed below will be included in the study: * Subjects between 65-85 years of age inclusive * Subjects with Short Physical Performance Battery of 10 or greater * Subjects averaging less than 5,000 steps per day * Subjects with Mini Mental State Exam 25-28, inclusive * Subjects with normal for age physical-neurological exam * Subjects able to walk a city block without a walking aid * Written Informed Consent obtained PRIOR to performing any study procedures Exclusion Criteria: * Subjects with difficult walking due to pain or posture * Subjects with difficulty in using computer due to significant visual and/or fine motor impairment * Subjects with large weight loss (\>15 Kilogram) in the last 12 months * Subjects with geriatric depression scale \> 9. * Subjects with Malignancies in the past 5 years, with the exception of skin cancer therapeutically controlled * Subjects with abnormal electrocardiogram results. These include: a resting heart rate below 40 bpm or above 100 bpm, previously unknown and/or untreated atrial fibrillation or flutter, evidence of a third degree A-V block, a previously undocumented left bundle branch block, S-T segment depression of greater than 2 mm, evidence of a previous MI, or any other findings that in the clinical judgment of the medical investigator preclude participation in an exercise intervention. * Subjects with shortness of breath, exertional angina, uncontrolled high blood pressure or any other chronic medical condition deemed by the physician to preclude participation in an exercise intervention. * Subjects with any other medical condition or disease that is life-threatening or that can interfere with, or be aggravated by, exercise. * Subjects who currently smoke.