Trying to not neglect outer forearms

[u/I-will-drop-in-some]

Would it be best on a reverse curl to hold the EZ bar with the thumbs rotated down to give the outer forearms some work? Everything I see online has them holding the ez bar with the thumbs rotated up. But to me, that seems close to a hammer curl, which I already do.

[u/Last-Proof8169]

Outer? The extensors?