Went to the doctor today for a quick blood pressure check. Blood pressure is fine, faa requires it. Anyways, while I was there I mentioned my hand (it has gotten better), and he was shocked that I was on the bike for four hours. He actually showed concern, and said the max cardio activity I should be doing is 60 mins max three times a week. He said that hours of cardio has been proven to cause heart problems in Endurance athletes. I don’t plan on stopping what I am doing anytime soon, Thoughts anyone?