I'm feeling your pain! Had emergency appendectomy at age 45 (huge scar), and a total prostatectomy at 52. If I tried to do sit-ups, the abdominal muscles would go berserk! I had to have another surgery to remove the scar tissue from those two prior surgeries.... Have been taking it easy (cycling-related) ever since. Of course, since I have been off the bike(s), I've packed on the pounds. Other heather-related matters come as a result. Now I've got to lose a bunch. My goal for this Summer (by the end of September) is to lose 30 pounds, and then another 30 in the following year just to get myself to where I was before that first surgery...