15 percent of Ohio State athletes were found to have swelling of their hearts after suffering COVID-19. Researchers used MRI to look for possible evidence of myocarditis, or inflammation of the heart muscle. And these were not athletes who had become seriously ill with the virus. None of the athletes studied had been hospitalized. This study suggests even young athletes can have heart issues after they develop COVID-19, even if they have no symptoms. They should contact a doctor if they feel shortness of breath, chest pain or abnormal heart beat as they try to return to physical activity.