Inclusion Criteria:  Age 50 years and older Ability to provide informed consent Willing to accept random assignment to condition Resting systolic blood pressure 120 mmHg or greater Body mass index <40 kg/m2 Weight stable in the prior 3 months (<2 kg weight change) and willing to remain weight stable throughout the study Mini-mental state exam score of 24 or higher No change in blood pressure medications or other medications (prescriptions or dosing) in the prior 3 months and willing to maintain current medication regimen Free from clinical disease with the exception of hypertension  Exclusion Criteria:  Younger than age 50 History of uncontrolled hypertension (systolic blood pressure >180 mmHg and/or diastolic blood pressure >120 mmHg) Current smoker Abnormal blood pressure response to exercise (drop in systolic blood pressure below resting levels or systolic blood pressure >260 mmHg or diastolic blood pressure >115 mmHg) Regular vigorous aerobic/endurance exercise (>4 bouts/week, >30 min/bout at a workload >6 METS)