Inclusion Criteria:  Postmenopausal women (>12 months of amenorrhea) Estrogen deficient (no hormone therapies within the previous 12 months) Age 50 years and older Ability to provide informed consent Willing to accept random assignment to condition Resting systolic blood pressure of 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 study No change in blood pressure medications or other medications (prescription 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 years Early menopause (menopause before age 45 years) Having had a hysterectomy History of uncontrolled hypertension (systolic blood pressure >180 mmHg and/or diastolic blood pressure >120 mmHg) Current smoker Alcohol dependence or abuse 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)