Inclusion Criteria:  At entry into the study, all patients must:  be able to give written, informed consent demonstrate positive history of chronic claudication have an ankle brachial index < 0.90 at rest have a stable blood pressure regimen, stable lipid regimen, stable diabetes regimen and risk factor control for 6 weeks  Exclusion Criteria:  Any potential subjects will be excluded if they have:  rest pain or tissue loss due to peripheral artery disease (Fontaine stage III and IV) acute lower extremity ischemic event secondary to thromboembolic disease or acute trauma walking capacity significantly limited by conditions other than claudication including leg (joint/musculoskeletal, neurologic) and systemic (heart, lung disease) pathology