The reason after surgery, they recommend no weight lifting is due to the fact the sternum is healing, takes one year for the sternum to completely heal. And since you have been weight lifting since 2006, no chance of the blow out. Never heard of it.Can anyone cite a specific case where lifting weights directly caused a valve to "blow out." I can't find one example. I suspect the the "don't lift heavy weights camp" are just covering their behinds in the event of a medical malpractice lawsuit. Incidentally I have been powerlifting competitively with a CE bovine tissue valve since 2006 with no issues.