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When you go through your first week, your going to have alot more in your stomach at a time in contrast to when you are not bulking. Thus, (in the beginning) you will see a large weight gain...

I have friends that work exclusively with dumbbells and have pretty big physiques and I have also found myself able to make great gains off of dumbbells!!

To answer your question: Forever!!

Sweet dude!!!
Okay so first of all, you really should work your back!! It's the second biggest muscle group on your body!! You can work your back doing dumbbell rows.

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