Insulin is quite possibly the most misunderstood hormone amongst strength athletes and this is due to its connection with carbohydrates. As you may already know, high levels of insulin promote fat synthesis and at the same time decrease the break down of the fat. However the degree to which insulin promotes fat storage, as well as carb storage and protein synthesis at any one time, depends on an individuals body state. This is all to do with the degree of insulin sensitivity in the fat cells compared to the insulin sensitivity in the muscle cells; the more insulin sensitive the fat cells are at a given time, the more the insulin will act to promote fat storage. the more insulin sensitive the muscle cells are,the more the insulin will act to promote glycogen storage and protein synthesis.
THE MUSCLES ARE ESPECIALLY INSULIN SENSITIVE AFTER EXERCISE!
It is at this time you should be taking advantage of your body state and ingesting glucose and amino acids. At this point the insulin will support the rapid synthesis of muscle proteins and muscle glycogen, whilst at the same time storing very little fat in adipose tissue.
EXERCISE ALONG WITH A MODERATE CARB DIET WHICH IS HIGH IN FIBRE AND OBVIOUSLY PROTEIN, CAN INCREASE MUSCLE INSULIN SENSITIVITY.