With regard to exercise, stretching, and activity, I would emphasize that your own surgeon is your best authority for these questions, as they know the details of your procedure. I would encourage you to contact them to discuss your concerns. Many plastic surgeons allow their patients to begin to return to physical activity 4-6 weeks after surgery. I often emphasize to my patients to "listen to their body" and be conservative. The advice is simply to make certain that their recovery continues to progress comfortably. You may want to resume light aerobic activity such as a treadmill before considering any lifting or circuit training, and certainly when you do resume weights, you will want to start with your extremities before considering any exercise for your core. It may take a few months before your are comfortable with abdominal exercises. Congratulations on your body contouring! Your early photo looks like you are going to have a great result.