Often, persons manifesting severe forms of ARVD show a previous history of sport activity or of physically demanding jobs. This is expected, because physical exercise mobilizes a large volume of blood from the liver, thus increasing the load of the right ventricle. Moreover, during exercise, the heartbeat rate increases and the myocardial metabolism is stressed.
More severe deterioration means more severe symptoms.
It is very important to receive a clear diagnosis, before taking a decision, but, in my opinion, even in the case of a suspect of ARVD it should be wise to stop.