topcat - go and get a young and active dog from a rescue centre. Hour long walks a day on days off, half an hour every evening. You can't not go out cos you dont fancy it - as the pooch will drag you out.
Its been good for 25lbs weight loss for me! And a joy to have around the house.
PS should make clear that i'm a pilot not ATC but the class 1 requiremants are the same. You should email the CAA medical lot at Gatwick and ask if there is a top limit for BMI.