i dont know how to get defined. you can't see the muscle on my arms unless im flexing or doing somthing that requires my arms to flex. why is that? and how do i fix it?
definition comes from a low bodyfat...however you do need to have enough lean mass to look good when you hit a low bodyfat.
typically that's not an issue, unless you've been on a starvation diet and lost a lot of lean mass (or had surgery, or other medical condition that caused muscle wasting)