title: Invited commentary.
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Lynch
authors.forename: Jason M
authors.initials: JM
authors.lastname: Johanning
mesh_terms: D017079:Exercise Tolerance; D006801:Humans; D007383:Intermittent Claudication / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D007511:Ischemia / Q000150:complications / Q000503:physiopathology / Q000628:therapy*; D007717:Knee / Q000503:physiopathology; D035002:Lower Extremity / Q000098:blood supply*; D053580:Muscle Strength; D010101:Oxygen Consumption; D010147:Pain Measurement; D020127:Recovery of Function; D055070:Resistance Training; D013997:Time Factors; D016896:Treatment Outcome; D016138:Walking