Cardiac Athletes Website
Cardiac Athletes Strava (Cycling – running also exists)
https://www.strava.com/clubs/cardiac-athletes-cycling
Cardiac Athletes Facebook Group (closed)
https://www.facebook.com/groups/cardiacathletes/?multi_permalinks=1496850117013877
Articles from Cardiologist / Electrophysiologist
http://heartrhythmspecialist.co.uk/Heartrhythmspecialist.co.uk/Welcome.html