Yeah following on from what KoRin said it's all about priorities: If you've got a great core, strong legs, shoulders and back and your arms are still lagging, then you need to address the issue by adding exercises that involve the biceps more.
Thing is, most people try to do arms from the start of their training, like they're a major bodypart, and this is at the EXPENSE of the rest of their physique.
I still can't think of a better biceps exercise than close grip chins, as it's compound, can be easily cheated (for more reps) and has a great negative portion.
Yes I totally agree with that! Even the normal grip chins leaves the bis and forearms nice and pumped
