In response to the OP. Absolutely get into the best possible shape, because not only does it reduce the need for lypo (causes most of the bruising) but it means that you're nearer to the point where you can physically do no more to improve the situation. I just don't get it, when I see people going into surgery 2+ stone of fat overweight. But others may differ.
Congrats on the weight loss so far, good effort, now keep it up when it gets tougher
Also well done on booking the surgery, plenty of time to prepare. Whatever you do, don't stress about it, it's a breeze and recovery really isn't tough.