We know that training routine of UFC fighters consists of a lot of cardio and most of them look shredded. But, how do they succeed to gain 20 pounds of lean muscle for one month when they want to move up a weight class? Is it possible to gain that amount of lean muscle mass for that time? Well, it is possible. No matter that many people say that is physiologically impossible to gain more than one pound of lean muscle per week. And of course, absolutely without using steroids. Dr. John Berardi, Georges St-Pierre's nutritional coach tried that experiment on one UFC fighters and he gained 20 pounds of muscle for 28 days. The experiment started with the guy that had 169 pounds and after one month he weighed in at 190 pounds. More information about this experiment you can find on the blog of author Tim Ferris:   How To Gain 20 Pounds In 28 Days: The Extreme Muscle Building Secrets of UFC Fighter Most important things for building muscle mass ...