For some, it seems impossible to build muscle after gastric sleeve surgery. However, it is possible and we are going to share exactly why and how. Firstly, it is important to note that the weight you lose thanks to the surgery will normally show muscles that have been carrying the weight for many years; this is a little-known fact and one that you will see after surgery. As long as you maintain your diet, there is no reason why you can’t use light exercise to tone muscles and stay in shape.