Ok, but what about making rapid gains very quickly? At the moment my arm measures 39cm, which is roughly 15 and 1/3 inches, and I've just started a kind of creatine experiment and I fully expect to gain 3 or 4 cm, which is about 1 and 1/2 inches in less than 4 weeks. I have a photo of the before shot of my left arm under the tread untitled "creatine" with my bodyweight and waist measurement as well. To be honest, I am quite confident that I will be able to do this, but if I don't then I will admit it.