Hey Alex and welcome. Follow your doctor's orders as far as exercise is concerned. I was allowed to begin cardio 1 month after surgery and weightlifting 1 month after that. If this is your first experience with weightlifting, take it slow. Work out intense but work out smart. Listen to what your body tells you. Mixing cardio into the weightlifting will accelerate the weight loss. I ended up losing my 130 lbs in 7 months using this technique. The other thing to remember is that you must still fuel your body even though you are trying to lose weight. Protein is your friend especially in liquid form...these will pass through the sleeve quickly and absorb rapidly. Dont neglect carbs either, in moderation. Carbs will provide the energy your muscles need to lift those heavy weights and will replenish glycogen stores in the muscle tissue after you've exercised. Best of luck to you and don't quit...ever!