I don't know if I have slow arms. I do what I was trained, and then I adapted it. My way was a but faster, but it's still slow. I've only been doing MA for one year, and have very weak arms. That, of course, could be it, but I don't know. The way I do my hook is I turn my elbow so it's 90° (parallel with the ground), turn my back foot and hips and just punch sideways. It's simpler than it sounds. Does anyone have any tips or is it just my experience/muscle?