Hello, Ok im 125lbs and I am trying to add 10-20lbs in 3-4months. Now my problem is I have a very high metabalisim and I cant eat / buy enough food to gain weight. But what makes it worse is that I have to run more, I need to be running every other day at least. Now this is a big problem for me as that is something my gym trainer is telling me to avoid because it is burning to many calories off of me. Any suggestions? Also this may sound very stupid, but I had to ask somewhere.