Passive Calf Stretching Therapy in Peripheral Artery Disease

Patients with peripheral artery disease will passively stretch their calf muscles using a stretch device on both feet for 30 minutes a day for 4 weeks. Blood vessel health and size, length and function of the calf muscles and tendons and walking performance will be measured. Joint and foot movements as well as calf muscle oxygen levels will be measured during walking performance tests.

Inclusion criteria

• Presence of PAD
• Stable condition (PAD symptoms) for at least 3 months
• Age 40-85
• Men and women who are not pregnant or nursing

Exclusion criteria

• Ischemic leg pain at rest; critical limb ischemia (ulceration or gangrene)
• Any condition other than PAD that limits the ability to walk
• Major surgery or lower extremity revascularization surgery in the past 6 months
• Myocardial infarction within past 6 months or unstable angina
• Severe lung disease (on supplemental oxygen or frequently use rescue inhalers)
• Participants with non-compressible vessels (ABI > 1.40)
• Habitual exercise (30 minutes of continuous activity on 3 or more days per week)
• Current tobacco smoker or use of nicotine-containing products
• Pregnant or nursing women
• History or ankle reconstruction or surgery Recent history (<1 year) of injuries to the ankle, Achilles tendon, or feet
• History of rheumatoid arthritis or other degenerative joint disease
• Major medical illness treatment during the prior 12 months
• Uncontrolled hypertension
• Uncontrolled diabetes
• Inability to walk on a treadmill at a slow pace (1.0 mile/hour)