KING5.com | Exercise, Endurance Sports Increase Arryhthmia And Heart Failure Risk In ... RedOrbit A Johns Hopkins study finds that healthy people who carry a genetic mutation for arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) are at much higher risk of developing the symptoms of the life-threatening heart disease if they ... Intense Workouts Bad for Mutation Carriers Vigorous Exercise Bad For Hearts With Arrhythmic Gene Mutation |