If you have a difficult time gaining weight of any kind (fat or muscle) then you most likely have a fast metabolism. That simply means that your body burns calories at a faster than normal rate. You must take this into account whenever you are considering a particular diet or training program. Is it geared towards someone with your metabolism and goal? <br /><br />Now as you know, there are many ways to train. Hundreds, thousands even. Some work and some do not, but for the specific goal of gaining weight, there are a few UNIVERSAL things that all skinny guys must do ,. <br /> WHY CAN'T YOU GAIN WEIGHT? <br /> WHY CAN'T YOU GAIN WEIGHT?<br />Though there may be many reasons why you may be thin, the most apparent reason is because of your genetics. If your parents are naturally thin or have a small body frame, then you will most likely have the same small body type. <br /><br />To some degree, your size can also be controlled by your metabolism ,
