Sprinter Michael Johnson is talking about his experience when he experienced a stroke. He is a professional sprinter and described how he barely realized when he had his stroke and that only his coordination was disrupted and that his arm was tickling weirdly. After he got a check at the hospital he could not even properly walk anymore. At this point walking had to be learned and practiced from zero again. Working out did not just help him walk again, but also relax his mind.