title: Invited commentary.
authors.affiliation: Institute for Sports Science and Clinical Biomechanics, Faculty of Health Sciences, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
authors.forename: Hans
authors.initials: H
authors.lastname: Lund
mesh_terms: D019317:Evidence-Based Medicine; D005081:Exercise Therapy; D019983:Guideline Adherence; D006801:Humans; D009043:Motor Activity; D020370:Osteoarthritis, Knee / Q000628:therapy*; D026741:Physical Therapy Modalities