Inclusion Criteria:

• * Postmenopausal women (self-report at least 6 years since last menstrual cycle)
• * Aged 50-75 years (confirmed by birth date listed on participant's driver license at screening visit)
• * English-speaking
• * Body mass index between 25.0 to 39.9 kg/m2
• * Able to ambulate without assistance
• * Own or have access to a Bluetooth-capable phone or tablet (IOS version 12.0 or later or Android version 7.0 or later)

Exclusion Criteria:

• * Unable to provide informed consent.
• * Greater than stage II hypertension (i.e., \>159/99 mm Hg)
• * Current tobacco use (self-report)
• * Habitually exercise training ≥ 2 days per week (self-report)
• * Significant orthopedic limitations or other contraindications to strenuous exercise
• * Live or work \> 80 miles from Bloomington, Indiana
• * Anticipated elective surgery during the study period.
• * Surgery to the chest or abdomen in the last 6 months.
• * Plan to move residence or travel out of the local area during the study period.
• * History of heart attack or heart condition.
• * Current use of prescription medications that affect heart rate or blood vessel dilation (e.g., systemic b-adrenergic blockers, calcium channel blockers, and hormone replacement therapy).
• * Diagnosis of asthma or chronic pulmonary disease.
• * Current respiratory infection.
• * Diagnosis of an aneurysm in the chest, abdomen, or brain.
• * Psychological or social characteristics that would interfere with their ability to fully participate in the study.