I have been spinning for 6 years now. Sept 2010 I suddenly couldn't breathe, and started coughing uncontrollably. After catching my breath I went to the cardiologist and he sent me for a TEE where they determined that my Mitral valve had completely broken and was just flapping around. Two days later I had my second OHS. After the surgery I took it easy with the exercise. I just power walked 3 miles a day, 5 days a week. For my 1 year anniversary I started spinning again. I was up to an hour a day when my mitral valve repair failed.(2 months later) I received a mechancial valve this time. I am 9 weeks post op again and both my surgeon and cardiologist tell me to get back on the bike. But after 3 OPH's I am scared. I want to start exercising again. I hate feeling like a blob, but what if the new valve breaks? Has anyone had a mechancial valve fail due to exercise? Anyone have any inspiration for me?