It’s a simple fact: guys want big arms. Just walk into any commercial gym and you’ll see a line of people standing in front of mirrors working on their biceps and triceps.

Yet, despite all the attention heaped upon arms, so many guys struggle to develop theirs. Just gotta train more, right? Not likely. You can train your arms as much as you want, but if you keep making a few critical mistakes, you’ll never get great results.

Escape the black hole of ineffective arm training by learning the eight reasons why your arms still aren’t growing and exactly what you can do to fix it.