Video 1. Dystonia induced by fasting and a prolonged exercise. The patient was asked to run as far as she could. She had no manifestation when starting to run. After 20 minutes of running, she felt discomfort that she described as “a sensation of traction” within the left thigh preventing her from walking normally. After 50 minutes of physical exercise, she had dystonic contractions resulting in flexion of her hips and knees. She had similar difficulties when walking side to side or backwards. By contrast, she was able to run normally, corresponding to an improvement, when switching the motor program.

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