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McArdle Disease: A Unique Study Model in Sports Medicine
Universidad Pablo Olavide, Sevilla, Spain.
Neuromuscular Diseases Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, Universitat Autónoma de Barcelona, Barcelona, Spain .
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Department of Sports Science and Clinical Biomechanics, SDU Muscle Research Cluster (SMRC), University of Southern Denmark, Odense, Denmark. (NVC)
Departament de Patologia Mitocondrial i Neuromuscular, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autónoma de Barcelona, Pg. Vall d'Hebron 119, Barcelona, 08035, Spain .
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2014 (English)In: Sports Medicine, ISSN 0112-1642, E-ISSN 1179-2035, Vol. 44, no 11, 1531-1544 p.Article, review/survey (Refereed) Published
Abstract [en]

McArdle disease is arguably the paradigm of exercise intolerance in humans. This disorder is caused by inherited deficiency of myophosphorylase, the enzyme isoform that initiates glycogen breakdown in skeletal muscles. Because patients are unable to obtain energy from their muscle glycogen stores, this disease provides an interesting model of study for exercise physiologists, allowing insight to be gained into the understanding of glycogen-dependent muscle functions. Of special interest in the field of muscle physiology and sports medicine are also some specific (if not unique) characteristics of this disorder, such as the so-called 'second wind' phenomenon, the frequent exercise-induced rhabdomyolysis and myoglobinuria episodes suffered by patients (with muscle damage also occurring under basal conditions), or the early appearance of fatigue and contractures, among others. In this article we review the main pathophysiological features of this disorder leading to exercise intolerance as well as the currently available therapeutic possibilities. Patients have been traditionally advised by clinicians to refrain from exercise, yet sports medicine and careful exercise prescription are their best allies at present because no effective enzyme replacement therapy is expected to be available in the near future. As of today, although unable to restore myophosphorylase deficiency, the 'simple' use of exercise as therapy seems probably more promising and practical for patients than more 'complex' medical approaches.

Place, publisher, year, edition, pages
2014. Vol. 44, no 11, 1531-1544 p.
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-24047DOI: 10.1007/s40279-014-0223-5ISI: 000344974500005Scopus ID: 2-s2.0-84931025138OAI: oai:DiVA.org:miun-24047DiVA: diva2:778199
Available from: 2015-01-09 Created: 2015-01-07 Last updated: 2016-09-21Bibliographically approved

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