Pumping big muscle requires a lot of training and good discipline. In addition, eating nutritional food especially food that are rich in protein helps alot in pumping a muscle fast. Protein food are present on dairy products mostly on meat. However, you may also get fats on this meat. So always ensure that you are taking much protein than fat to get a better result. Its also advisable to use product you find in store like NO2 Black that helps a lot in building pure muscle.