I am going to basically agree with the video. But like he said, the variables he's throwing at the curve, and assumptions he makes have to be taken into account. For example, it assumes you're say 30 years old, and have no hit the gym basically ever...or not been involved in any sort of sport that may have already gotten you're muscle mass up. But then again, the average joe falls in this category.

Now for people on this forum that it doesn't apply to, the 30 pound in 5 year number is not gonna happen. We've already trained, and gained those initial pounds. Many of us started as teens, or perhaps played hockey, or whatever, and are not at the same starting point as those he's talking about in the video. If I never trained a day in my life, I figure at my age, I would probably be about 150-160 pounds at this level of bodyfat. I have 10+ years under my belt and am about 190 right now. so likely I have gained those 30 pounds he talks about already.

I'll extend the comments he made to most women, who can probably gain about 20 pounds in 5 years. again, these are the avg. some will only be able to beef up 5 pounds, others maybe 30...

Finally, I'd like to point out that if you were to plot me on that curve, i'd probably be right in the middle. I am genetically strong perhaps, but as a bodybuilder, I have a hard time putting on muscle.