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The genetic basis of many muscular disorders, including many of the more common muscular dystrophies, is now known. Clinically, the recent genetic advances have improved diagnostic capabilities, but they have not yet provided clues about treatment or management. Thanks to better management strategies and therapeutic interventions, however, many patients with a muscular dystrophy are more active and are living longer. Physical therapists, therefore, are more likely to see a patient with a muscular dystrophy, so understanding these muscle disorders and their management is essential. Physical therapy offers the most promise in caring for the majority of patients with these conditions, because it is unlikely that advances in gene therapy will significantly alter their clinical treatment in the near future. This perspective covers some of the basic molecular biological advances together with the clinical …