Reverse Curls..regular grip, or thumbless?

[JG1]

Whats better for isolating the forearms when doing reverse curls, a regular grip, or thumbless (thumb on top of the bar)?

I notice I can do more weight when I use a regular grip, so I'm thinking the regular grip hits the biceps more then the thumbless.

 

[b fold the truth]

Vary it..as long as neither bother your wrists or elbows.

B True