ABSTRACT

I
ntroduction: Myasthenia Gravis (MG) is a relatively rare autoimmune disorder caused by an antibody-mediated blockage of neuromuscular transmission resulting in a skeletal muscle weakness and rapid muscle fatigue. Muscular weakness in MG can affect ocular, limb, respiratory, and bulbar muscles, which varies over time and is often activity or exercise induced. Case Illustration: A 28-year-old man with easily fatigued when performing working activities as an anesthesiology resident such as manual bagging, intubation, and cardiopulmonary resuscitation. Patient was diagnosed with MG with dominant symptoms which are hand tremors and fatigue. From physical examination, we found fair left hand grip strength, relatively similar dexterity on both hands, exercise intolerance, low cardiorespiratory and muscle endurance. Laboratory examination showed negative antibodies for MG. Radiology findings showed that he had no abnormalities. The patient did several physical exercises given by physiatrist, such as aerobic exercise, upper extremity resistance exercise, task-spesific exercise, and core muscle exercise. Discussion: Exercise capacity in MG may be restricted by proximal muscle weakness, fatigability, and impairment in respiratory muscle function. Physical exercise leads to an immune response, with a rise in T regulatory cells, decreased immunoglobulin secretion, and a shift in the Th1/Th2 balance towards a decreased Th1 cell production. Beneficial effects of physical activity are improvements in mood, reduction in fatigue, and positive effects on cognition and mobility. Conclusion: Physical exercise such as aerobic exercise and resistance training on upper extremities are proven to reduce fatigue and hand tremors, and also improve the quality of life of MG patients.
Keywords: myasthenia gravis, physical exercise