How long would it take to get his body-mass?

http://www.youtube.com/watch?v=HBBzPIALhWw

After he transforms, lol. I'd love to have that type of mass.

He's big. Maybe a year?

With the proper diet and dedication a few months.

SweeeeT! :D

A few months. I highly doubt.

It will depend on your size now, whether you're a fast gainer and diet, let alone the work out dedication.

That guy has thick arms, i'm guessing 16 inches. It takes about a year to gain 1 inch of pure muscle on your upper arms. The average mans arms are 13 inches around. It takes progressively longer the bigger you get, 13 to 14 is quicker than 14 to 15 etc. So if you had 14 inch arms, 2 inches on them will take about 1 year minimum i think.

So even if you just wanted his size arms, i'd say you'd most likely look at a year.

Plus, he probably got injected some anabolics as well, so yeah. I'm an endomorph mixed with a little bit of mesomorph, hope that helps.

I'd say with good training and diet within 12 months. He has a nice physique that any guy could want and attain without the drugs. He 'may' have used but you cant tell, he could easily have not used. He isn't the typical freakish bodybuilder you see around. Go for it. I need to hit the gym again soon myself, have become more ripped and need to just tweak in some places.

Scientifically speaking, non-AAS induced muscle growth can occur at a maximum of around 1lb per week... that's assuming that rest, training, and diet are all 100% perfect.

Genetics has a role to play as well, and of course a balanced set of hormones is what most people focus on in this regard.

Overall, 8-12 weeks of training can net weight gain over 8-12lbs because naturally when putting on mass and increasing caloric intake above your TDEE (total daily energy expenditure), you will store some fat as well.

Cardio is the most under-rated exercise, which if combined in a moderate degree may help with a more lean transformation for any mass building program. Stay active, and EAT!!!