This doesnt pertain to beginners or even guys with a couple of years of training. Im referring to advanced trainers. For instance, guys that have been training 5 plus years. Do you guys think that a strength increase is necessary to induce muscle growth? This has me very interested since most IGF users arent experiencing strength increases, but they seem to be putting on some tissue. To put it bluntly, would your strength on chest exercises have to increase to correspond to an increase in muscle tissue??