I'm a little different type of "chronic cardio". I read utility meters for a living, so 5 or 6 days a week I walk around outside for anywhere between 10 and 20 miles a day. In the summer (115F) it's pretty rough. Today was steep hills for 7 hour straight, so that really sucked.
I think it has been one of the biggest reasons why it has been so hard to lose the last 5 or so pounds, so for me what I changed was my thinking. Honestly, the best move for me was to accept that, at age 47 and a chronic cardio job, I was going to have a very small rounding of the belly while still being quite healthy and retaining my muscle.
Maybe not the advice you were looking for, but something to consider along with all of the dietary and exercise advice that will probably follow.