IRON MAN said:I quit training biceps for 6 month just to see what would happen and lost 1 inch in my arms. And yes I was still doing heavy rows n chins and my weight remained unchanged. So for me the proof is in the pudding.
I call bullshit, but whatever.
I consider barbell curls a basic movement for the biceps. If you want big triceps, lying tricep extensions are equivalent to what the squats is for the quads. I am with Lee Priest and Manfred Hoeberl on the idea that rows and presses are not enough for the biggest guns possible!!!
I could not have grown 22 inch guns by using ONLY Back, Chest, and Shoulder work. I tried and failed miserably.
I don't necessarily disagree. I think for optimal arm size, oftentimes added isolation work is beneficial. Most people just overdo it. As well, I don't think an absolute beginner in resistance training needs to bother with isolation work.