Metabolic myopathy is a group of muscle disorders caused by problems in the body's energy production processes. These conditions often result from genetic mutations that affect how muscles use carbohydrates, fats, or proteins for energy. Symptoms can include muscle weakness, cramps, and fatigue, especially during exercise. Diagnosis typically involves blood tests, muscle biopsies, and genetic testing to identify specific metabolic defects. Treatment may include dietary changes, exercise programs, and sometimes medications to help manage symptoms. Early diagnosis and intervention can improve quality of life for those affected by metabolic myopathy.